Answer to Question #249318 in Optics for Ahamd

Question

ASSERTION (A): IN CASE OF REFRACTION OF LIGHT THROUGH A GLASS SLAB , ANGLE OF INCIDENCE IS EQUAL TO ANGLE OF EMERGENCE .

REASON (R):A GLASS SLAB IS A CUBOID MADE UP OF A GLASS IN WHICH REFRACTION OCCURS FROM THE CORRESPONDING PARALLEL SURFACES.

CHOOSE THE CORRECT OPTION:

(A).BOTH (A) AND (R) ARE TRUE AND (R) IS THE CORRECT EXPLANATION OF (A)

(C).(A) IS TRUE BUT (R) IS FALSE .

(D).(A) IS FALSE BUT (R) IS TRUE

Answer 1

The correct answer is -

A. Both A and R is correct and R is the correct explanation of A.

Explanation - For a rectangular glass slab, the angle of emergence for a ray of light is equal to the angle of incidence. These angles will not be equal when the sides of the glass slab are not parallel.