In the experiment to trace the path of a ray of light through a parallel sided glass slab, a student measured the angles of refraction for three different angles of incidence. He will find that:
(1) angle of refraction is always equal to the angle of incidence
(2) angle of refraction is always smaller than the angle of incidence
(3) angle of refraction is always greater than the angle of incidence
(4) angle of refraction can be smaller or greater than the angle of incidence depending on the refractive index of glass slab

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Solution

When a light ray enters a glass slab, it bends towards the normal due to change in the medium from rarer to denser. So, the angle of refraction is always smaller than the angle of incidence.

Hence, the correct answer is option 2.

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Similar questions

Q. Statement 1: Angle of incidence is greater than the angle of refraction.
Statement 2: Angle of incidence is lesser than the angle of refraction.
Statement 3: Angle of emergence is equal to the angle of incidence.
Which of the following is/are correct with respect to refraction in a glass slab?

A ray of light passes from glass into air, angle of refraction; (a) equal to the angle of incidence (b) greater than the angle of incidence (c) smaller than the angle of incidence (d) $45^{\circ}$

Q. State whether true or false:

The angle of incidence is always smaller than angle of refraction when a ray travels from air to glass, at an oblique angle

Q. A ray of light is incident on glass slab making an angle of incidence

s i n^{- 1} (\frac{\sqrt{3}}{2})

. What will be the angle of refraction in glass of refractive index 1.5?

Refracted angle is always greater than the incidence angle.

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When a light ray enters a glass slab, it bends towards the normal due to change in the medium from rarer to denser. So, the angle of refraction is always smaller than the angle of incidence. Hence, the correct answer is option 2.

When a light ray enters a glass slab, it bends towards the normal due to change in the medium from rarer to denser. So, the angle of refraction is always smaller than the angle of incidence.

Hence, the correct answer is option 2.