PLEASE FILL THE BITS
(1) optical fibers employ total___________________.
(2)when a light ray enters glass slab from air , the angle of refraction is __________________angle of incidence.
(3)to observe total internal reflection we need to have incident angle to be greater than _______________________.
CHOOSE THE CORRECT ANSWER
(1) the refractive index of a medium , given that its critical angle is 45 degrees
(a) 1.414 (b) 1.732
(c) 1.3 (d) 2.42