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question_answer1)
Which one of the following statements is true?
A)
A plane mirror sometimes forms an inverted image. done
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B)
A concave mirror always forms a virtual, erect and diminished image. done
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C)
A concave lens always forms a virtual, erect and diminished image. done
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D)
All of the above done
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question_answer2)
Which of the following is used for splitting sunlight into seven colors?
A)
A prism done
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B)
A plane mirror done
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C)
A concave mirror done
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D)
A convex lens done
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question_answer3)
Which of the following is a natural source of light?
A)
Electric lamp done
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B)
Tube light done
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C)
Torch done
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D)
The sun done
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question_answer4)
What is the nature of the propagation of light?
A)
Curvilinear done
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B)
Rectilinear done
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C)
Random done
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D)
Circular done
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question_answer5)
What is rectilinear propagation of light?
A)
Travelling in curved lines done
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B)
Travelling in straight lines done
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C)
The ability to bend around obstacles done
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D)
The display of the phenomenon of diffraction done
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question_answer6)
What is called a source of light?
A)
An object that can absorb light done
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B)
An object that can reflect light done
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C)
An object that can refract light done
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D)
An object that can emit light done
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question_answer7)
Which of the following is a reflector of light?
A)
The sun done
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B)
The moon done
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C)
The star done
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D)
The filament done
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question_answer8)
What causes the formation of shadows?
A)
Rectilinear propagation of light done
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B)
Curvilinear propagation of light done
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C)
Total internal reflection done
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D)
Refraction done
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question_answer9)
A Identify the nature of light emitted from a torchlight.
A)
Convergent done
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B)
Divergent done
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C)
Parallel done
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D)
Irregular done
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question_answer10)
What is a stream of light called?
A)
Ray done
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B)
Beam done
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C)
Twilight done
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D)
Sunlight done
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question_answer11)
A ray of light is incident on a plane mirror at an angle of incidence of\[{{30}^{o}}.\]What is the angle of reflection?
A)
\[30{}^\circ \] done
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B)
\[60{}^\circ \] done
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C)
\[90{}^\circ \] done
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D)
\[120{}^\circ \] done
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question_answer12)
How many colours is white light made up of?
A)
A single colour done
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B)
Primary colours done
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C)
Five colours done
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D)
Seven colours done
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question_answer13)
Why can't we see anything in a dark room?
A)
Everything is black in colour. done
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B)
Our eyes do not work in darkness. done
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C)
No light reaches our eyes. done
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D)
All the light gets scattered. done
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question_answer14)
Which of these surfaces cannot produce clear images?
A)
Rough surface done
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B)
Ideal surface done
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C)
Smooth surface done
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D)
Curved surface done
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question_answer15)
What enables us to see objects?
A)
Light absorbed by an object done
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B)
Light that enters our eyes after it is reflected by an object done
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C)
Light dispersed by an object done
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D)
Light refracted through the object done
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question_answer16)
If the angle of incidence is \[80{}^\circ \], what will be the angle of reflection with respect to the normal drawn perpendicular at the point of reflection?
A)
\[80{}^\circ \] done
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B)
\[100{}^\circ \] done
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C)
\[160{}^\circ \] done
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D)
\[20{}^\circ \] done
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question_answer17)
Which of the following is used by an E.N.T. doctor?
A)
Convex mirror done
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B)
Convex lens done
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C)
Plane mirror done
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D)
Concave mirror done
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question_answer18)
If the angle of incidence is \[50{}^\circ \], what is the angle between the incident ray and the reflected ray?
A)
\[50{}^\circ \] done
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B)
\[100{}^\circ \] done
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C)
\[130{}^\circ \] done
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D)
\[80{}^\circ \] done
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question_answer19)
Which of the following are used in projectors?
A)
Concave lens done
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B)
Convex mirrors done
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C)
Plane mirrors done
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D)
Convex lenses done
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question_answer20)
Which of the following are used as reflectors in torchlights?
A)
Concave mirrors done
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B)
Plane mirrors done
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C)
Convex mirrors done
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D)
Concave lens done
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question_answer21)
To prevent the mirror from getting scratched, which colour is painted at the back of the mirror?
A)
Red done
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B)
Yellow done
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C)
Blue done
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D)
Green done
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question_answer22)
What kind of an image is always produced by a convex mirror?
A)
An erect, virtual and diminished image done
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B)
An erect, real and diminished image done
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C)
An erect, real and enlarged image done
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D)
A virtual, erect and enlarged image done
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question_answer23)
Which of the following can form enlarged, virtual images?
A)
Convex mirrors done
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B)
Concave mirrors done
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C)
Plane mirrors done
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D)
Concave lens done
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question_answer24)
What is a spherical mirror?
A)
A reflecting, elliptical surface done
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B)
A reflecting, spherical surface done
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C)
A reflecting, parabolic surface done
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D)
A flat, reflecting surface done
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question_answer25)
What is a real image?
A)
It cannot be captured on a screen. done
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B)
It can be captured on a screen. done
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C)
It can be captured only on a celluloid screen. done
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D)
It is always magnified. done
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question_answer26)
Which of the following produces a virtual image for any position of the object?
A)
Convex lens done
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B)
Pinhole camera done
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C)
Concave mirror done
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D)
Convex mirror done
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question_answer27)
What happens during lateral inversion?
A)
The right of the object will be on the right side of the image. done
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B)
The left side of the object will be on the left side of the image. done
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C)
The upper part of the object will be at the bottom of the object. done
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D)
The right side of the object will be on the left side of the image. done
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question_answer28)
A reflecting surface is curved outwards. Which of the following mirrors is it likely to be?
A)
Concave done
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B)
Plane done
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C)
Convex done
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D)
All of the above done
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question_answer29)
Why are convex mirrors used by drivers as rear view mirrors in vehicles?
A)
They reflect light better than othel mirrors. done
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B)
They produce images which are clearer than those produced by others done
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C)
They produce magnified images. done
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D)
They give a wide field of view. done
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question_answer30)
Why are images inverted in a pinhole camera?
A)
Light travels in straight lines. done
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B)
Images are always inverted. done
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C)
Image gets inverted when the light travels through a hole. done
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D)
There is no specific reason. done
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question_answer31)
An object placed 3 m from a plane mirror is shifted by 0.4 m away from the mirror. What is the new distance between the object and its image?
A)
6.4 m done
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B)
6.8 m done
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C)
6 m done
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D)
5.2 m done
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question_answer32)
Which of the following is NOT a characteristic feature of a convex mirror?
A)
The image lies between the pole and focus. done
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B)
The image is diminished in size. done
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C)
The image is erect. done
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D)
The image is real. done
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question_answer33)
The figure given below shows an image produced by an object placed in front of a plane mirror.
Which is the object from among the following?
A)
B)
C)
D)
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question_answer34)
Why is a spectrum of seven colours formed when sunlight passes through a prism?
A)
White light is a mixture of seven colours. done
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B)
The different colours of light is reflected at different angles in a glass prism. done
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C)
The prism adds colour to the white sunlight. done
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D)
Light travels at high speed. done
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question_answer35)
Rahul told his friend that ?X? can form a virtual image larger than the object by reflection. What is ?X??
A)
Plane mirror done
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B)
Convex mirror done
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C)
Concave mirror done
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D)
Concave lens done
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question_answer36)
The image produced by Q is real. Identify Q from the following.
A)
Plane mirror done
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B)
Convex lens done
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C)
Concave lens done
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D)
Convex mirror done
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question_answer37)
How many letters in the English alphabets have the image formed in a plane mirror appear exactly like the letter itself?
A)
4 done
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B)
8 done
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C)
9 done
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D)
11 done
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question_answer38)
A Match the entries given in Column-l with those in Column-ll.
| Column I | | Column II |
a. | Plane mirror | 1. | Used as a magnifying glass |
b. | Convex mirror | 2. | Can form images of objects spread over a large area |
c. | Convex lens | 3. | Used by dentists to see enlarged images of teeth |
d. | Concave mirror | 4. | 1 mage is erect and of the same size as the object |
e. | Concave lens | 5. | The image is erect and smaller than the object |
A)
a-4, b-5, c-3, d-1, e-2 done
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B)
a-4, b-5, c-1, d-3, e-2 done
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C)
a-4, b-3, c-2, d-5, e-1 done
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D)
a-4, b-1, c-3, d-2, e-5 done
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question_answer39)
Mirrors '1, '2' and '3' are placed at right angles as shown below and a beam of light is made incident on mirror T.
What will be the angle of reflection from mirror 3?
A)
\[30{}^\circ \] done
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B)
\[45{}^\circ \] done
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C)
\[60{}^\circ \] done
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D)
The reflected ray from mirror ?2? will be parallel to the surface of mirror '3' done
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question_answer40)
Which of the following letters will be seen without any change in a plane mirror?
A)
S done
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B)
T done
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C)
L done
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D)
P done
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