Question

A student traces the path of a ray of light through a rectangular glass slab for angles of incidence 40degree, 50degree, 60degreeseparately. He observed that the perpendicular distance ‘d’ between the incident ray and emergent ray : (a) increases with increase in angle of incidence. (b) decreases with increase in angle of incidence. (c) remaines the same for all the three angles. (d) first increases and then decreases.

Answer 1

D decreases with the increase in angle of incidence i , attains a minimum value and then increases with the further increase in the angle of incidence .