10th Class Physics Human Eye and Colourful World Question Bank

done The Human Eye and the Colourful World

•  i. Red ii. Green iii. Blue iv. Yellow

A) Only (i) and (ii)

B) Only (iii) and (iv)

C) Only (i), (ii) and (iii)

D) Only (i), (iii) and (iv)

• A) 1/4th to 1/8th of a second

B) 1/16th to 1/20th of a second

C) 1/20th to 1/24th of a second

D) 1/6th to 1/10th of a second

• A) 1.396

B) 1.196

C) 1.296

D) 1.496

• A) Contact lenses

B) Laser treatment

C) Spectacles

D) All of the above

• A) It makes adjustments to allow appropriate amount of light into the eyes.

B) It bends the light rays to form a sharp image.

C) It collects and sends information to the brain for further processing.

D) All of the above

• A) numerous nerve endings.

B) no nerve endings.

C) few nerve endings.

D) nerve endings which increase in number as age advances.

• A) -2 D

B) +2 D

C) -0.5 D

D) +0.5 D

• A) Due to old age

B) Due to a change in focal length

C) Due to the shortening of the eye ball

D) Due to the elongation of the eye ball

• A) Its weight

B) Its distance

C) Its temperature

D) Its size

• A) Blue

B) Green

C) Violet

D) Red

• A) 2.0 cm

B) 2.8 cm

C) 2.6 cm

D) 2.3 cm

• A) On the outer surface of the cornea

B) On the crystalline lens

C) On the vitreous humour

D) On the retina

• A) Myopia

B) Hypermetropia

C) Presbyopia

D) Astigmatism

• A) Univocal

B) Concavo-convex

C) Bi-focal

D) Convexo-concave

• A) Due to reflection

B) Due to refraction

C) Due to atmospheric refraction

D) Due to deviation

• A) A magnifying glass

B) An eye

C) A piece of glass

D) A plane mirror

• A) It increases.

B) It decreases.

C) It remains constant.

D) It may increase or decrease.

• A) A glass piece

B) A piece of ice

C) A glass of water

D) A mirror

• A) Iris

B) Pupil

C) Cornea

D) Ciliary muscles

• A) $\text{12}0{}^\circ$

B) $\text{15}0{}^\circ$

C) $\text{18}0{}^\circ$

D) $\text{36}0{}^\circ$

• A) One-third

B) Two-fourth

C) Three-fifth

D) Five-sixth

• A) The scattering of red light is much less than that of yellow light.

B) The scattering of red light is more than that of yellow light.

C) Yellow light, when scattered, is brighter.

D) Red light, when scattered, is brighter.

• A) concave lens of focal length 25 cm.

B) concave lens of focal length 50 cm.

C) convex lens of focal length 25 cm.

D) convex lens of focal length 50 cm.

• A) Myopia, Hypermetropia

B) Hypermetropia, presbyopia

C) Myopia, presbyopia

D) Myopia, Cataract

• A)

 Team X Team Y White shirts, blue shorts White shirts, black shorts

B)

 Team X Team Y Yellow shirts, blue shorts Yellow shirts, blue shorts

C)

 Team X Team Y Yellow shirts, black shorts Yellow shirts, black shorts

D)

 Team X Team Y White shirts black shorts White shirts, blue shorts

• A) The lens moves diagonally.

B) The retina expands and contracts.

C) The lens becomes thicker and thinner.

D) The pupil becomes larger and smaller.

• A) White

B) Black

C) Pink

D) Yellow

• A) The near point of his eyes has receded away.

B) The near point of his eyes has come closer to him.

C) The far point of his eyes has receded away.

D) The far point of his eyes has come closer to him.

•  (i) Sodium lamp (ii) Sunlight (iii) LPG gas

A) Only (i)

B) Only (i) and (ii)

C) Only (i) and (iii)

D) Only (ii) and (iii)

• A) The type of light incident on an object

B) The ratio in which an object absorbs the different colours of light

C) The manner in which the reflected or refracted light influences our eyes

D) All of the above

• A) Colorless

B) White

C) Blue

D) Black

• A) On the north side

B) On the south side

C) In the direction opposite to the sun

D) The sun and the rainbow are on the same side

• A) Both the eyes appear red.

B) Both the eyes appear yellow.

C) Left eye appears yellow and right eye, red.

D) Left eye appears red and right eye yellow.

• A) -1.66D

B) +60D

C) -60 D

D) $\frac{1}{1.66}D$

• A) The object absorbs red colour.

B) The object allows red colour to pass through.

C) The object absorbs and refracts red colour.

D) The object reflects red colour.

•  (i) It has least wavelength (ii) It has longer wavelength (iii) It scatters the least

A) Only (ii)

B) Only (i) and (ii)

C) Only (i) and (iii)

D) Only (ii) and (iii)

• A) 2 D

B) - 2 D

C) - 0.5 D

D) 5 D

• A) Because equivalent focal length remains the same as that of the spectacles.

B) Because the focal length of the eye lens is effectively decreased.

C) Because the image of the plate is formed at a longer distance.

D) Both (a) and (b)

• A) Concave lens, 100 cm

B) Concave lens, 40 cm

C) Convex lens, 40 cm

D) Convex lens, 50 cm

•  Column-I Column-II a. The blue colour of the sky 1. Total internal reflection b. The glittering of diamond 2. Refraction of light c. The formation rainbow 3. Scattering of light d. The visibility of sun for something even after sunset 4. Dispersion of light

A) a-3, b-1, c-4, d-2

B) a-1, b-3, c-2, d-4

C) a-2, b-3, c-4, d-1

D) a-4, b-1, c-3, d-2

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