Question

38. A diver in a swimming pool wants to signal his
distress to a person lying on the
edge of the pool by
flashing his water proof flash light:
(a) He must direct the beam vertically upward
(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 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 total internal reflection​

Answer 1

Answer:

c) He has to direct the beam at an angle to the

vertical which is slightly less than critical angle of

incidence for total internal reflection

is your correct answer