when light is incident from surface a to surface b the there is no deviation. Then angle i=0 and angle r=0. so refractive index of b with respect to a is= sin i/sinr=0/0=infinte?
when light is incident from surface a to surface b the there is no deviation. Then angle i=0 and angle r=0. so refractive index of b with respect to a is= sin i/sinr=0/0=infinte?
