A) He must direct the beam vertically upwards
B) He has to direct the beam horizontally
C) He has to direct the beam at an angle to the vertical which is slightly less than the critical angle of incidence for total internal reflection
D) He has to direct the beam at an angle to the vertical which is slightly more than the critical angle of incidence for the total internal reflection
Correct Answer: C
Solution :
When incident angle is greater than critical angle, then total internal reflection takes place and will come back in same medium.
You need to login to perform this action.
You will be redirected in
3 sec
