Aravind placed a glass slab on a drawing sheet and marked its boundary as ABCD. Then he removed the glass slab and drew a line PQ on the side AB. He placed the glass slab in position, passed light from a laser torch through it along P?. He observed the path of light through the glass slab and marked the points Q, R and S. AB is the surface of seperation of air and glass and that CD is the surface of seperation of glass and air.
1. Which is the incident ray on the surface of separation CD?
a. PQ
b. QR
c. RS
d. None of these
2. Is the angle of refraction greater or lower than the angle of incidence when it goes from air to glass?
a. Greater
b. Lower
3. Is the angle of refraction greater or lower than the angle of incidence when it goes from glass to air?
a. Greater
b. Lower
4. Which is of greater optical density - air or glass?
a. Air
b. Glass
5. While going from air to glass, the refracted ray deviates
a. Away from normal
b. Towards the normal
