student very cautiously traces the path of a

Question

A student very cautiously traces the path of a ray through a glass slab for different values of the angle of incidence $(∠ i) .$ He then measures the corresponding values of the angle of refraction $(∠ r)$ and the angle of emergence $(∠ e)$ for every value of the angle of incidence. On analysing these measurements of angles, his conclusion would be :

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(2)

As angle of incidence is equal to angle of emergence when light ray is passed through the prism, and angle of refraction is smaller than two.

Solution

1 $∠ i > ∠ r > ∠ e$

2 $∠ i = ∠ e > ∠ r$

3 $∠ i < ∠ r < ∠ e$

4 $∠ i = ∠ e < ∠ r$

Ans.
(2)

As angle of incidence is equal to angle of emergence when light ray is passed through the prism, and angle of refraction is smaller than two.

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Solution

1 ∠i > ∠r > ∠e

2 ∠i = ∠e > ∠r

3 ∠i < ∠r < ∠e

4 ∠i = ∠e < ∠r