NCERT Class X Science Class: Chapter –11. Human Eye and Colourful World – Part-4

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Question 12:

When light rays enter the eye, most of the refraction occurs at the

(a) Crystalline lens

(b) Outer surface of the cornea

(c) Iris

(d) Pupil

Answer: B

Image cornea and retina

Image Cornea and Retina

Image cornea and retina

Question 13:

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

Answer: A

Image distance object,

Image Distance Object,

Image distance object,

Question 14:

Which of the following statement is correct?

(a) A person with myopia can see distant objects clearly

(b) A person with Hypermetropia can see nearby objects clearly

(c) A person with myopia can see nearby objects clearly

(d) A person with Hypermetropia cannot see distant objects clearly

Answer: C

Image concave lens, not focused, foused

Image Concave Lens, Not Focused, Foused

Image concave lens, not focused, foused

Short Answer Questions

Question 15:

Draw ray diagrams each showing

(i) Myopic eye.

(ii) Hypermetropic eye.

Answer:

Image Myopic eye and Hypermetropic eye.

Image Myopic Eye and Hypermetropic Eye.

Image Myopic eye and Hypermetropic eye.