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Class 10 Science Chapter 11 The Human Eye And The Colourful World Quiz 1 (60 MCQs)

Quiz Instructions

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1. What lens should be served to eliminate the deficiency of pressbiopia?
2. Light enters the eye through
3. Rods help in .....
4. What color light is the maximum in glass prism?
5. Why does scattering of light occur?
6. The junction of the optic nerve and retina is called
7. Following controls and regulates the amount of light entering the eye
8. ..... lies behind the pupil
9. How much time does entire eye removal procedure takes-
10. The farthest point upto which the eye can see objects clearly is ..... for a normal eye.
11. Teleption for the normal eye ..... is at a distance?
12. The clear sky appears blue because
13. The human eye forms the image of an object at its
14. The defect of vision in which the person is able to see distant object distinctly but cannot see nearby objects clearly is called
15. What happens to the image distance in the eye when we increase the distance of an object from the eye?
16. Why is the component of color in a rainbow can be seen when light passes through a glass prism?
17. The least distance of distinct vision for a young adult with normal vision is about
18. The dark muscular tissue and ring like structure behind the cornea are known as
19. An image is formed on
20. What controls the amount of light entering the eye?
21. The colour of ..... indicates the colour of the eye
22. The ability of the eye lens to adjust its focal length is called
23. The focal length of human eye lens is ( with relaxed eye)-
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.
25. The black opening between the aqueous humour and the lens is called
26. The person who is suffering from ..... requires bi-focal lens.
27. Iris controls the size of
28. When the light rays enters the eye, most of the refraction occurs at the
29. The change in focal length of an eye lens is caused by the action of the
30. By passing light through a prism, you can tell .....
31. Why do stars twinkle?
32. Changes in the centrifugal of the lens of the eye ..... does it?
33. To see an object comfortably and distinctly, we must hold it about ..... cm from our eyes.
34. A person with ..... can see nearby objects clearly but can't see distant objects distinctly.
35. The human eye can focus on objects at different distances by adjusting the focal length of the eye lens. This is due to
36. The near point for a young adult with normal vision is
37. We can see the sun before the actual sunrise about
38. ..... controls the amount of light that enters into the eye
39. What is the correct order of the colors of the rainbow?
40. The stars twinkle but the planets do not twinkle at night because
41. ..... is a light sensitive layer that has numerous nerve cells
42. When light passes at an angle to the normal from one material into another material in which its speed is lower
43. 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
44. Optic nerve cells sensitive to bright light
45. Dispersion of light by a prism is due to the change in-
46. The focal length of eye lens is controlled by:
47. Convex lens of suitable focal length can correct-
48. The shape of eye-ball is nearly .....
49. ..... send signals to the brain
50. The lens focuses light on the .....
51. In the human eye, the image of an object is formed at the .....
52. What converts images formed by the lens into electrical impulses?
53. Far-sightedness can be rectified by using a concave lend of suitable power.
54. When an object is placed closer to eye .....
55. For normal vision, the far point is at ..... distance.
56. The far point for a normal eye is
57. Blind spot is at the junction of
58. The phenomenon of ..... of light by the colloidal particles gives rise to the Tyndall effect.
59. Myopia and Hypermetropia can be corrected by
60. Myopia is also called
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