Question

experiments on tracing the path of of a ray of light through a rectangular glass slab was performed by 4 students A B C and D. The measurement of angle i angle r and angle e are given below:

Student ( i r e)------- angles r in this sequence

A ( 30 , 19, 30) ; B (40, 26, 40) ;C (50, 37, 51) ; D(60,35,59)

The incorrect observation is by student

a) A

b) B

c) C

d) D

Pls explain this question fast.... my exam tmrw!!!

Answer 1

C AND D observation are wrong vecause angle of incidence is always equal to angle of reflection