The angle of incidence i and refraction r are equal in a transparent slab when the value of i is
A. 0°
B. 45°
C. 90°
D. depend on the material of the slab
Answer:A
The angle of incidence i and refraction r are equal in a transparent slab when the value of i is
A. 0° B. 45° C. 90° D. depend on the material of the slab