Which of the following conditions are needed to take “Total Internal Reflection”?
a) Light rays travel front denser to rarer medium
b) Light rays travel fromrarer to denser medium
c) Angle of incidence is greater than critical angle
d) Angle of incidence is smaller than < critical angle
A) only (a)
B) (a) and (c)
C) (b) and (d)
D) (a) and (d)