5 There are two plane mirror inclined at 40 as shown in the

Last updated: 6/20/2023

5 There are two plane mirror inclined at 40 as shown in the figure A ray of light is incident on mirror M then what should be the value of angle of incidence i so that the light ray retraces its path after strking the mirror M 1 40 2 50 40 M 3 60 M 4 70