A student performs the experiment by tracing the path of a ray of light passing through a rectangular glass slab for different angles of incidence. He measures the angle of incidence $∠ i$ , angle of refraction $∠ r$ , and angle of emergence $∠ e$ for all his observations. He would find that in all cases ___________________.

see full answer

Talk to JEE/NEET 2025 Toppers - Learn What Actually Works!

Real Strategies. Real People. Real Success Stories - Just 1 call away

An Intiative by Sri Chaitanya

$∠ i = ∠ e < ∠ r$

$∠ i = ∠ e > ∠ r$

$∠ i < ∠ e < ∠ r$

$∠ i > ∠ e > ∠$

answer is D.

(Unlock A.I Detailed Solution for FREE)

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Detailed Solution

The incidence angle is equal to the emergence angle because the incident ray is parallel to the emerging ray i.e. $∠ i = ∠ e$
The angle of refraction is less than the angle of incidence because the ray, which passes from the rarer medium (air) to the denser medium (glass slab), slightly bends in the direction of the normal after refraction i.e. $∠ r < ∠ i$
$∠ i = ∠ e > ∠ r$