CBSE Class 10 Science The Human Eye and The Colourful World MCQ Questions with answers accessible here. Multiple Choice Questions for a significant piece of exams for Grade 10 Science and whenever practiced appropriately can assist you with getting better marks.

Practice Class 10 Science MCQ Questions of The Human Eye and the Colourful World

Refer to more Chapter-wise MCQ Questions of The Human Eye and The Colourful World with Answers. MCQ Questions will help students to comprehend their Knowledge level.

1. The image formed by retina of human eye is

(a) Virtual and erect
(b) Real and inverted
(c) Virtual and inverted
(d) Real and erect

2. The light sensitive cell present on retina and is sensitive to the intensity of light is:

(a) Cones
(b) Rods
(c) Both rods and cones
(d) None of these

3. The part of the eyes refracts light entering the eye from external objects?

(a) Lens
(b) Cornea
(c) Iris
(d) Pupil

4. The amount of light entering the human eye is controlled by

(a) Ciliary muscles
(b) Pupil
(c) Cornea
(d) Iris

5. At noon the sun appears white as

(a) light is least scattered.
(b) all the colours of the white light are scattered away.
(c) blue colour is scattered the most.
(d) red colour is scattered the most.

6. Which of the following phenomena of light are involved in the formation of a rainbow?

(a) Reflection, refraction and dispersion
(b) Refraction, dispersion and total internal reflection
(c) Refraction, dispersion and internal reflection
(d) Dispersion, scattering and total internal reflection

7. Twinkling of stars is due to atmospheric

(a) dispersion of light by water droplets
(b) refraction of light by different layers of varying refractive indices
(c) scattering of light by dust particles
(d) internal reflection of light by clouds

8. The clear sky appears blue because

(а) blue light gets absorbed in the atmosphere.
(b) ultraviolet radiations are absorbed in the atmosphere.
(c) violet and blue lights get scattered more than lights of all other colours by the atmosphere.
(d) light of all other colours is scattered more than the violet and blue colour lights by the atmosphere.

9. The danger signals installed at the top of tall buildings are red in colour. These can be easily seen from a distance because among all other colours, the red light

(a) is scattered the most by smoke or fog.
(b) is scattered the least by smoke or fog.
(c) is absorbed the most by smoke or fog.
(d) moves fastest in air.

10. The focal length of the eye lens increases when eye muscles

(a) are relaxed and lens becomes thinner
(b) contract and lens becomes thicker
(c) are relaxed and lens becomes thicker
(d) contract and lens becomes thinner

11. Human eye is formed image on:

(a) cornea
(b) iris
(c) pupil
(d) retina

12. Far point of a man suffering from short-sightedness is:

(a) at 25 cm
(b) at less than 25 cm
(c) at infinity
(d) at less than infinity.

13. Image formed in normal eye of human is:

(a) on retina
(b) beyond retina
(c) behind retina
(d) at infinity.

14. Minimum distance of clear vision is:

(a) 25 cm
(b) 2.5 cm
(c) 25 cm
(d) 2.5 cm

15. Eye lens is:

(a) converging
(b) diverging
(c) convex and concave
(d) none of these

16. The black opening between the aqueous humour and the lens is called

(a) retina
(b) iris
(c) cornea
(d) pupil

17. Myopia and hypermetropia can be corrected by

(a) Concave and plano-convex lens
(b) Concave and convex lens
(c) Convex and concave lens
(d) Plano-concave lens for both defects.

18. Bi-focal lens are required to correct

(a) astigmatism
(b) coma
(c) myopia
(d) presbyopia

19. Refraction of light by the earth’s atmosphere due to variation in air density is called

(a) atmospheric reflection
(b) atmospheric dispersion
(c) atmospheric scattering
(d) atmospheric refraction

20. One cannot see through the fog, because

(a) refractive index of the fog is very high
(b) light suffers total reflection at droplets
(c) fog absorbs light
(d) light is scattered by the droplets

Answer Key

1. (b) Real and inverted

2. (b) Rods

3. (b) Cornea

4. (b) Pupil

5. (a) light is least scattered.

6. (c) Refraction, dispersion and internal reflection

7. (b) refraction of light by different layers of varying refractive indices

8. (c) violet and blue lights get scattered more than lights of all other colours by the atmosphere.

9. (b) is scattered the least by smoke or fog.

10. (a) are relaxed and lens becomes thinner

11. (d) retina

12. (b) at less than 25 cm

13. (a) on retina

14. (c) 25 cm

15. (a) converging

16. (d) pupil

17. (b) Concave and convex lens

18. (d) presbyopia

Explanation: Bifocal lens is required to correct the presbyopia. Upper point of bifocal lens consists of concave lens used for distant vision while lower point consists of convex lens facilitate near vision.

19. (d) atmospheric refraction

Explanation: This phenomenon is called atmospheric refraction.

20. (d) light is scattered by the droplets

Explanation: Objects are not visible through the fog because droplets scatter the light rays.

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