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Anatomy of an Eye

When light ra...

Question

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

A

Crystalline lens

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B

Outer surface of the cornea

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C

Iris

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D

Pupil

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Solution

The correct option is B Outer surface of the cornea
Cornea is the transparent spherical part of the eye covering the iris and pupil. When an object appears in front of the eye, the rays from the object enter through this transparent cornea and refraction occurs at the outer surface. thus, option $B$ is correct.

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Q. 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

Q. Maximum refraction of light rays entering the eye takes place from

Q. Fill in the following blanks with suitable words:
(a) Most of the refraction of light rays entering the eye occurs at the outer surface of the.............
(b) The part of eye sensitive to light is...................
(c) The part of eye which alters the size of the pupil is............
(d) When light is dim, the pupil becomes................
(e) The iris controls the amount of................entering the eye.
(f) The ciliary muscles control the shape of the ...............
(g) To bring light from a distant object to a focus on the retina of the eye, the convex eye-lens needs to be made..........
(h) To bring light from a near object to a focus on the retina of the eye, the convex eye-lens need to be made.......

Q. When light enters our eyes, the first refraction of light takes place at?

Q. Where does most of the refraction of light occur in a human eye?

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