JEE Main & Advanced Physics Question Bank

done Human Eye and Lens Camera Total Questions - 65

• question_answer1)
  A far sighted man who has lost his spectacles, reads a book by looking through a small hole (3-4 mm) in a sheet of paper. The reason will be                                                         [CPMT 1977]
  A)
             Because the hole produces an image of the letters at a longer distance  done clear
  B)
             Because in doing so, the focal length of the eye lens is effectively increased  done clear
  C)
             Because in doing so, the focal length of the eye lens is effectively decreased done clear
  D)
             None of these done clear
  View Solution play_arrow

• question_answer2)
  For a normal eye, the least distance of distinct vision is    [CPMT 1984]
  A)
             0.25 m                                      done clear
  B)
             0.50 m  done clear
  C)
             25 m                                         done clear
  D)
             Infinite  done clear
  View Solution play_arrow

• question_answer3)
  For the myopic eye, the defect is cured by    [CPMT 1990; KCET (Engg.) 2000]
  A)
             Convex lens                          done clear
  B)
             Concave lens  done clear
  C)
             Cylindrical lens                     done clear
  D)
             Toric lens  done clear
  View Solution play_arrow

• question_answer4)
  Lens used to remove long sightedness (hypermetropia) is or A person suffering from hypermetropia requires which type of spectacle lenses                                               [MP PMT 1995]
  A)
             Concave lens                        done clear
  B)
             Plano-concave lens  done clear
  C)
             Convexo-concave lens     done clear
  D)
             Convex lens  done clear
  View Solution play_arrow

• question_answer5)
  Substance on the choroid is  
  A)
             Japan black                            done clear
  B)
             Nigrim pigment  done clear
  C)
             Carbon black                         done clear
  D)
             Platinum black done clear
  View Solution play_arrow

• question_answer6)
  Astigmatism (for a human eye) can be removed by using [CPMT 1972; MP PET/PMT 1988; CBSE PMT 1990]
  A)
             Concave lens                        done clear
  B)
             Convex lens  done clear
  C)
             Cylindrical lens                     done clear
  D)
             Prismatic lens  done clear
  View Solution play_arrow

• question_answer7)
  Circular part in the centre of retina is called    [MP PET/PMT 1988]
  A)
             Blind spot                               done clear
  B)
             Yellow spot  done clear
  C)
             Red spot                                 done clear
  D)
             None of the above  done clear
  View Solution play_arrow

• question_answer8)
  Image formed on the retina is         
  A)
             Real and inverted               done clear
  B)
             Virtual and erect  done clear
  C)
             Real and erect                      done clear
  D)
             Virtual and inverted done clear
  View Solution play_arrow

• question_answer9)
  If there had been one eye of the man, then 
  A)
             Image of the object would have been inverted done clear
  B)
             Visible region would have decreased  done clear
  C)
             Image would have not been seen three dimensional  done clear
  D)
             (b) and (c) both done clear
  View Solution play_arrow

• question_answer10)
  A person cannot see distinctly at the distance less than one metre. Calculate the power of the lens that he should use to read a book at a distance of 25 cm  [CPMT 1977; MP PET 1985, 88; MP PMT 1990]
  A)
             + 3.0 D                                     done clear
  B)
             + 0.125 D done clear
  C)
             ? 3.0  D                                    done clear
  D)
             + 4.0 D done clear
  View Solution play_arrow

• question_answer11)
  How should people wearing spectacles work with a microscope
  A)
             They cannot use the microscope at all  done clear
  B)
             They should keep on wearing their spectacles done clear
  C)
             They should take off spectacles  done clear
  D)
             (b) and (c) is both way  done clear
  View Solution play_arrow

• question_answer12)
  A man who cannot see clearly beyond 5 m wants to see stars clearly. He should use a lens of focal length [MP PET/PMT 1988; Pb. PET 2003]
  A)
             ? 100 m                                   done clear
  B)
             + 5 m done clear
  C)
             ? 5 m                                        done clear
  D)
             Very large  done clear
  View Solution play_arrow

• question_answer13)
  A man can see only between 75 cm and 200 cm. The power of lens to correct the near point will be
  A)
             + 8/3 D                                     done clear
  B)
             + 3 D done clear
  C)
             ? 3 D                                         done clear
  D)
             ? 8/3 D done clear
  View Solution play_arrow

• question_answer14)
  Image is formed for the short sighted person at [AFMC 1988]
  A)
             Retina                                      done clear
  B)
             Before retina  done clear
  C)
             Behind the retina                done clear
  D)
             Image is not formed at all  done clear
  View Solution play_arrow

• question_answer15)
  A man can see the objects upto a distance of one metre from his eyes. For correcting his eye sight so that he can see an object at infinity, he requires a lens whose power is  or A man can see upto 100 cm of the distant object. The power of the lens required to see far objects will be [MP PMT 1993, 2003]
  A)
             + 0.5 D                                     done clear
  B)
             + 1.0 D   done clear
  C)
             + 2.0 D                                     done clear
  D)
             ? 1.0 D  done clear
  View Solution play_arrow

• question_answer16)
  A man can see the object between 15 cm and 30 cm. He uses the lens to see the far objects. Then due to the lens used, the near point will be at   
  A)
             \[\frac{10}{3}\]cm              done clear
  B)
     30 cm   done clear
  C)
             15 cm                                       done clear
  D)
             \[\frac{100}{3}\]cm   done clear
  View Solution play_arrow

• question_answer17)
  The far point of a myopia eye is at 40 cm. For removing this defect, the power of lens required will be [MP PMT 1987]
  A)
             40 D                                          done clear
  B)
             ? 4 D done clear
  C)
              ? 2.5 D                                    done clear
  D)
     0.25 D done clear
  View Solution play_arrow

• question_answer18)
  A man suffering from myopia can read a book placed at 10 cm distance. For reading the book at a distance of 60 cm with relaxed vision, focal length of the lens required will be    [MP PMT 1989]
  A)
             45 cm                                       done clear
  B)
             ? 20 cm   done clear
  C)
             ? 12 cm                                    done clear
  D)
             30 cm   done clear
  View Solution play_arrow

• question_answer19)
  If the distance of the far point for a myopia patient is doubled, the focal length of the lens required to cure it will become                                                                      [MP PET 1989]
  A)
             Half   done clear
  B)
             Double   done clear
  C)
             The same but a convex lens   done clear
  D)
             The same but a concave lens   done clear
  View Solution play_arrow

• question_answer20)
  A presbyopic patient has near point as 30 cm and far point as 40 cm. The dioptric power for the corrective lens for seeing distant objects is  
  A)
             40 D                                          done clear
  B)
     4 D   done clear
  C)
     ? 2.5 D done clear
  D)
             0.25 D   done clear
  View Solution play_arrow

• question_answer21)
  An imaginary line joining the optical centre of the eye lens and the yellow point is called as  
  A)
             Principal axis                         done clear
  B)
             Vision axis  done clear
  C)
             Neutral axis                           done clear
  D)
             Optical axis  done clear
  View Solution play_arrow

• question_answer22)
  The light when enters the human eye experiences most of the refraction while passing through
  A)
             Cornea                                    done clear
  B)
     Aqueous humour   done clear
  C)
             Vitrous humour                   done clear
  D)
     Crystalline lens   done clear
  View Solution play_arrow

• question_answer23)
  The impact of an image on the retina remains for
  A)
             0.1 sec                                      done clear
  B)
             0.5 sec   done clear
  C)
             10 sec                                       done clear
  D)
             15 sec  done clear
  View Solution play_arrow

• question_answer24)
  A person is suffering from myopic defect. He is able to see clear objects placed at 15 cm. What type and of what focal length of lens he should use to see clearly the object placed 60 cm away                                                     [MP PMT 1991]
  A)
             Concave lens of 20 cm focal length    done clear
  B)
             Convex lens of 20 cm focal length   done clear
  C)
             Concave lens of 12 cm focal length   done clear
  D)
             Convex lens of 12 cm focal length  done clear
  View Solution play_arrow

• question_answer25)
  The sensation of vision in the retina is carried to the brain by
  A)
             Ciliary muscles                      done clear
  B)
             Blind spot  done clear
  C)
             Cylindrical lens                     done clear
  D)
             Optic nerve done clear
  View Solution play_arrow

• question_answer26)
  When the power of eye lens increases, the defect of vision is produced. The defect is known as  
  A)
             Shortsightedness                done clear
  B)
             Longsightedness  done clear
  C)
             Colourblindness                  done clear
  D)
             None of the above  done clear
  View Solution play_arrow

• question_answer27)
  A man is suffering from colour blindness for green colour. To remove this defect, he should use goggles of  
  A)
             Green colour glasses         done clear
  B)
             Red colour glasses  done clear
  C)
             Smoky colour glasses        done clear
  D)
             None of the above   done clear
  View Solution play_arrow

• question_answer28)
  In human eye the focussing is done by                [CPMT 1983]
  A)
             To and fro movement of eye lens  done clear
  B)
             To and fro movement of the retina   done clear
  C)
             Change in the convexity of the lens surface  done clear
  D)
             Change in the refractive index of the eye fluids done clear
  View Solution play_arrow

• question_answer29)
  A short sighted person can see distinctly only those objects which lie between 10 cm and 100 cm from him. The power of the spectacle lens required to see a distant object is   [MP PET 1992]
  A)
             + 0.5 D                                     done clear
  B)
             ? 1.0 D done clear
  C)
             ? 10 D                                       done clear
  D)
             + 4.0 D done clear
  View Solution play_arrow

• question_answer30)
  A person can see clearly only upto a distance of 25 cm. He wants to read a book placed at a distance of 50 cm. What kind of lens does he require for his spectacles and what must be its power                                         [MP PMT 1992]
  A)
             Concave, ? 1.0 D                  done clear
  B)
             Convex, + 1.5 D done clear
  C)
             Concave, ? 2.0 D                  done clear
  D)
             Convex, + 2.0 D done clear
  View Solution play_arrow

• question_answer31)
  The human eye has a lens which has a              [MP PET 1994]
  A)
             Soft portion at its centre done clear
  B)
             Hard surface done clear
  C)
             Varying refractive index done clear
  D)
             Constant refractive index done clear
  View Solution play_arrow

• question_answer32)
  A man with defective eyes cannot see distinctly object at the distance more than 60 cm from his eyes. The power of the lens to be used will be                                            [MP PMT 1994]
  A)
             + 60 D                                       done clear
  B)
             ? 60 D done clear
  C)
             ? 1.66 D                                   done clear
  D)
             \[\frac{1}{1.66}D\] done clear
  View Solution play_arrow

• question_answer33)
  A person's near point is 50 cm and his far point is 3 m. Power of the lenses he requires for (i)       reading and (ii)      for seeing distant stars are                        [MP PMT 1994]
  A)
             ? 2 D and 0.33 D                   done clear
  B)
             2 D and ? 0.33 D done clear
  C)
             ? 2 D and 3 D                         done clear
  D)
             2 D and ? 3 D done clear
  View Solution play_arrow

• question_answer34)
  A person wears glasses of power ? 2.5 D. The defect of the eye and the far point of the person without the glasses are respectively                                                                  [MP PET 1995]
  A)
             Farsightedness, 40 cm      done clear
  B)
             Nearsightedness, 40 cm done clear
  C)
             Astigmatism, 40 cm            done clear
  D)
             Nearsightedness, 250 cm done clear
  View Solution play_arrow

• question_answer35)
  Myopia is due to                                                           [AFMC 1996]
  A)
             Elongation of eye ball done clear
  B)
             Irregular change in focal length done clear
  C)
             Shortening of eye ball done clear
  D)
             Older age done clear
  View Solution play_arrow

• question_answer36)
  A person is suffering from the defect astigmatism. Its main reason is                                      [MP PMT 1997]
  A)
             Distance of the eye lens from retina is increased done clear
  B)
             Distance of the eye lens from retina is decreased done clear
  C)
             The cornea is not spherical done clear
  D)
             Power of accommodation of the eye is decreased done clear
  View Solution play_arrow

• question_answer37)
  A person cannot see objects clearly beyond 2.0 m. The power of lens required to correct his vision will be [MP PMT/PET 1998; JIPMER 2000; KCET 2000; Pb. PET 2001]
  A)
             + 2.0 D                                     done clear
  B)
             ? 1.0 D done clear
  C)
             + 1.0 D                                     done clear
  D)
             ? 0.5 D done clear
  View Solution play_arrow

• question_answer38)
  The resolving limit of healthy eye is about [MP PET 1999; RPMT 1999; AIIMS 2001]
  A)
             \[{1}'\] or \[{{\left( \frac{1}{60} \right)}^{{}^\circ }}\]            done clear
  B)
             \[{1}''\] done clear
  C)
             \[{{1}^{o}}\]                          done clear
  D)
             \[\frac{1}{60}''\] done clear
  View Solution play_arrow

• question_answer39)
  When objects at different distances are seen by the eye, which of the following remains constant           [MP PMT 1999]
  A)
             The focal length of the eye lens done clear
  B)
             The object distance from the eye lens done clear
  C)
             The radii of curvature of the eye lens done clear
  D)
             The image distance from the eye lens done clear
  View Solution play_arrow

• question_answer40)
  A person wears glasses of power ? 2.0 D. The defect of the eye and the far point of the person without the glasses will be                                                                                         [MP PMT 1999]
  A)
             Nearsighted, 50 cm            done clear
  B)
             Farsighted, 50 cm done clear
  C)
             Nearsighted, 250 cm          done clear
  D)
             Astigmatism, 50 cm done clear
  View Solution play_arrow

• question_answer41)
  An eye specialist prescribes spectacles having a combination of convex lens of focal length 40 cm in contact with a concave lens of focal length 25 cm. The power of this lens combination in diopters is [IIT 1997 Cancelled; DPMT 2000]
  A)
             + 1.5                                         done clear
  B)
             ? 1.5 done clear
  C)
             + 6.67                                       done clear
  D)
             ? 6.67 done clear
  View Solution play_arrow

• question_answer42)
  Match the List I with the List II from the combinations shown                                      [ISM Dhanbad 1994]

  (I)	Presbiopia		Sphero-cylindrical lens
  (II)	Hypermetropia		Convex lens of proper power may be used close to the eye
  (III)	Astigmatism		Concave lens of suitable focal length
  (IV)	Myopia		Bifocal lens of suitable focal length

  A)
             I-A; II-C; III-B; IV-D              done clear
  B)
             I-B; II-D; III-C; IV-A done clear
  C)
             I-D; II-B; III-A; IV-C              done clear
  D)
             I-D; II-A; III-C; IV-B done clear
  View Solution play_arrow

• question_answer43)
  Near and far points of a human eye are [EAMCET (Med.) 1995; MP PET 2001; BCECE 2004]
  A)
             0 and 25 cm                           done clear
  B)
             0 and ¥ done clear
  C)
             25 cm and 100 cm                done clear
  D)
             25 cm and ¥ done clear
  View Solution play_arrow

• question_answer44)
  Two parallel pillars are 11 km away from an observer. The minimum distance between the pillars so that they can be seen separately will be                                        [RPET 1997; RPMT 2000]
  A)
             3.2 m                                        done clear
  B)
             20.8 m done clear
  C)
             91.5 m                                      done clear
  D)
             183 m done clear
  View Solution play_arrow

• question_answer45)
  Retina of eye acts like........ of camera                 [AFMC 2003]
  A)
             Shutter                                    done clear
  B)
             Film done clear
  C)
             Lens                                          done clear
  D)
             None of these done clear
  View Solution play_arrow

• question_answer46)
  The hyper-metropia is a                                       [CBSE PMT 2000]
  A)
             Short-side defect                done clear
  B)
             Long- side defect done clear
  C)
             Bad vision due to old age done clear
  D)
             None of these done clear
  View Solution play_arrow

• question_answer47)
  Amount of light entering into the camera depends upon [DCE 2000]
  A)
             Focal length of the objective lens done clear
  B)
             Product of focal length and diameter of the objective lens done clear
  C)
             Distance of the object from camera done clear
  D)
             Aperture setting of the camera done clear
  View Solution play_arrow

• question_answer48)
  A man cannot see clearly the objects beyond a distance of 20 cm from his eyes. To see distant objects clearly he must use which kind of lenses and of what focal length  [MP PMT 2000]
  A)
             100 cm convex                     done clear
  B)
             100 cm concave done clear
  C)
             20 cm convex                        done clear
  D)
             20 cm concave done clear
  View Solution play_arrow

• question_answer49)
  A person uses spectacles of power +2D. He is suffering from      [MP PET 2000]
  A)
             Short sightedness or myopia done clear
  B)
             Long sightedness or hypermetropia done clear
  C)
             Presbyopia                            done clear
  D)
             Astigmatism done clear
  View Solution play_arrow

• question_answer50)
  To remove myopia (short sightedness) a lens of power 0.66 D is required. The distant point of the eye is approximately v[MP PMT 2001]
  A)
             100 cm                                     done clear
  B)
             150 cm done clear
  C)
             50 cm                                       done clear
  D)
             25 cm done clear
  View Solution play_arrow

• question_answer51)
  A person suffering from 'presbyopia' (myopia and hyper metropia both defects) should use       [MP PET 2001]
  A)
             A concave lens done clear
  B)
             A convex lens done clear
  C)
             A bifocal lens whose lower portion is convex done clear
  D)
             A bifocal lens whose upper portion is convex done clear
  View Solution play_arrow

• question_answer52)
  A person who can see things most clearly at a distance of 10 cm. Requires spectacles to enable to him to see clearly things at a distance of 30 cm. What should be the focal length of the spectacles              [BHU 2003; CPMT 2004; PM PMT 2005]
  A)
             15 cm (Concave)                  done clear
  B)
             15 cm (Convex) done clear
  C)
             10 cm                                       done clear
  D)
             0 done clear
  View Solution play_arrow

• question_answer53)
  Far points of myopic eye is 250 cm, then the focal length of the lens to be used will be   [DPMT 2002]
  A)
             ? 250 cm                                 done clear
  B)
             ? 250/9 cm done clear
  C)
             + 250 cm                                 done clear
  D)
             + 250/9 cm done clear
  View Solution play_arrow

• question_answer54)
  A man can see clearly up to 3 metres. Prescribe a lens for his spectacles so that he can see clearly up to 12 metres [DPMT 2002]
  A)
             ? 3/4 D                                     done clear
  B)
             3 D done clear
  C)
             ? 1/4 D                                     done clear
  D)
             ? 4 D done clear
  View Solution play_arrow

• question_answer55)
  A satisfactory photographic print is obtained when the exposure time is 10 sec at a distance of 2 m from a 60 cd lamp. The time of exposure required for the same quality print at a distance of 4 m from a 120 cd lamp is [Kerala PMT 2002]
  A)
             5 sec                                         done clear
  B)
             10 sec done clear
  C)
             15 sec                                       done clear
  D)
             20 sec done clear
  View Solution play_arrow

• question_answer56)
  A person cannot see the objects clearly placed at a distance more than 40 cm. He is advised to use a lens of power [DCE 2002; MP PMT 2002, 03]
  A)
             ? 2.5 D                                     done clear
  B)
             + 2.5 D done clear
  C)
             ? 6.25 D                                   done clear
  D)
             + 1.5 D done clear
  View Solution play_arrow

• question_answer57)
  A person uses a lens of power + 3D to normalise vision. Near point of hypermetropic eye is         [CPMT 2002]
  A)
             1 m                                            done clear
  B)
             1.66 m done clear
  C)
             2 m                                            done clear
  D)
             0.66 m done clear
  View Solution play_arrow

• question_answer58)
  A defective eye cannot see close objects clearly because their image is formed                                                 [MP PET 2003]
  A)
             On the eye lens done clear
  B)
             Between eye lens and retina done clear
  C)
             On the retina done clear
  D)
             Beyond retina done clear
  View Solution play_arrow

• question_answer59)
  Image formed on retina of eye is proportional to  [RPMT 2001]
  A)
             Size of object                        done clear
  B)
             Area of object done clear
  C)
             \[\frac{Size\ of\ object}{Size\ of\ image}\]                 done clear
  D)
             \[\frac{size\ of\ image}{size\ of\ object}\] done clear
  View Solution play_arrow

• question_answer60)
  A student can distinctly see the object upto a distance 15 cm. He wants to see the black board at a distance of 3 m. Focal length and power of lens used respectively will be  [Pb. PMT 2003]
  A)
             \[-\,4.8\,cm,\ -\,3.3\,D\]  done clear
  B)
             \[-\,5.8\,cm,\ -\,4.3\,D\] done clear
  C)
             \[-\,7.5\,cm,\ -\,6.3\,D\]  done clear
  D)
             \[-\,15.8\,cm,\ -\,6.3\,D\] done clear
  View Solution play_arrow

• question_answer61)
  A camera objective has an aperture diameter d. If the aperture is reduced to diameter \[d/2,\] the exposure time under identical conditions of light should be made  [Kerala PMT 2004]
  A)
             \[\sqrt{2}\]fold                    done clear
  B)
             2 fold done clear
  C)
             \[2\sqrt{2}\]fold                  done clear
  D)
             4 fold done clear
  View Solution play_arrow

• question_answer62)
  The light gathering power of a camera lens depends on  [DCE 2003]
  A)
             Its diameter only done clear
  B)
             Ratio of focal length and diameter done clear
  C)
             Product of focal length and diameter done clear
  D)
             Wavelength of light used done clear
  View Solution play_arrow

• question_answer63)
  The exposure time of a camera lens at the \[\frac{f}{2.8}\] setting is \[\frac{1}{200}\] second. The correct time of exposure at \[\frac{f}{5.6}\] is [DCE 2003]
  A)
             0.4 sec                                      done clear
  B)
             0.02 sec done clear
  C)
             0.002 sec                                 done clear
  D)
             0.04 sec done clear
  View Solution play_arrow

• question_answer64)
  Ability of the eye to see objects at all distances is called [AFMC 2005]
  A)
             Binocular vision                    done clear
  B)
             Myopia done clear
  C)
             Hypermetropia done clear
  D)
             Accommodation done clear
  View Solution play_arrow

• question_answer65)
                                                                                                                    Identify the wrong description of the above figures [KCET 2005]
  A)
             1 represents far-sightedness                                            done clear
  B)
             2 correction for short sightedness done clear
  C)
             3 represents far sightedness done clear
  D)
             4 correction for far-sightedness done clear
  View Solution play_arrow