In the diagram above, a ray of light passes from glass into air, if the angle of incidence in glass is a and angle of refraction in air is ( beta ) which of following statements is true???
-
A.
( alpha = beta ) -
B.
the efractive index of glass is ( frac{sintheta}{sinalpha} ) -
C.
The ray suffers total internal reflection if ( beta ) is greater than the critical angle -
D.
the efractive index of glass is ( frac{sinalpha}{sinbeta} )