Physics
A light ray travelling from denser to rarer medium at an angle of incidence more than critical angle of concerned media pair suffers.

Total internal reflection
Diffraction
Reflection
Refraction

ANSWER DOWNLOAD EXAMIANS APP

Physics
What is refractive index ?

It is defined as the ratio of speed of light in the medium to the speed of light in vacuum.
It is defined as the ratio of speed of light in vacuum to the speed of light in the medium.
It is defined as the product of speed of light in medium and in vacuum.
None of above

ANSWER DOWNLOAD EXAMIANS APP