Question

Rahim recorded the following sets of observations while tracing the path of a ray of light passing through a rectangular glass slab for different angles of incidence.

S. No.	Angle of incidence	Angle of refraction	Angle of emergence
I	45°	41°	45°
II	40°	38°	38°
III	45°	41°	40°
IV	41°	45°	41°

The correct observation is recorded at serial number: 

(1) I

(2) II 

(3) III 

(4) IV 

Answer 1

(1) I