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Class 10 Science Chapter 11 The Human Eye And The Colourful World Quiz 1 (25 MCQs)

Quiz Instructions

Select an option to see the correct answer instantly.

1. What lens should be served to eliminate the deficiency of pressbiopia?

Correct Answer: A) Biofocle.

2. Light enters the eye through

Correct Answer: D) Cornea.

3. Rods help in .....

Correct Answer: C) Peripheral vision.

4. What color light is the maximum in glass prism?

Correct Answer: D) Reddish.

5. Why does scattering of light occur?

Correct Answer: A) Light rays are blocked and reflected to all directions by the clouds or particles in the air.

6. The junction of the optic nerve and retina is called

Correct Answer: C) Blind spot.

7. Following controls and regulates the amount of light entering the eye

Correct Answer: B) Pupil.

8. ..... lies behind the pupil

Correct Answer: C) Lens.

9. How much time does entire eye removal procedure takes-

Correct Answer: B) 20-30min only.

10. The farthest point upto which the eye can see objects clearly is ..... for a normal eye.

Correct Answer: C) Infinity.

11. Teleption for the normal eye ..... is at a distance?

Correct Answer: D) Infinite.

12. The clear sky appears blue because

Correct Answer: C) Violet and blue lights get scattered more than lights of all other colours by the atmosphere.

13. The human eye forms the image of an object at its

Correct Answer: A) Retina.

14. The defect of vision in which the person is able to see distant object distinctly but cannot see nearby objects clearly is called

Correct Answer: A) Far-sightedness.

15. What happens to the image distance in the eye when we increase the distance of an object from the eye?

Correct Answer: C) The image distance increases.

16. Why is the component of color in a rainbow can be seen when light passes through a glass prism?

Correct Answer: B) Phenomena of dispersion of light.

17. The least distance of distinct vision for a young adult with normal vision is about

Correct Answer: A) 25 cm.

18. The dark muscular tissue and ring like structure behind the cornea are known as

Correct Answer: C) Iris.

19. An image is formed on

Correct Answer: C) Retina.

20. What controls the amount of light entering the eye?

Correct Answer: C) Pupil.

21. The colour of ..... indicates the colour of the eye

Correct Answer: D) Iris.

22. The ability of the eye lens to adjust its focal length is called

Correct Answer: A) Accommodation.

23. The focal length of human eye lens is ( with relaxed eye)-

Correct Answer: A) 2.5cm.

24. Make a diagram to show how hypermetropia is corrected. The near point of a hypermetropic eye is 1 m. What is the power of the lens required to correct this defect? Assume that the near point of the normal eye is 25 cm.

Correct Answer: A) +4 D.

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

Correct Answer: D) Pupil.

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