A ray of light strikes a glass slab at 90°. The angle of incidence is :
A. 90°
B. zero
C. less than 90°, but not zero
D. none of these
Answer:B
A ray of light strikes a glass slab at 90°. The angle of incidence is :
A. 90° B. zero C. less than 90°, but not zero D. none of these