What name is given to the ratio of sine of angle of incidence to the sine of angle of refraction?

For a given pair of media, the ratio of the sine of the angle of incidence to the sine of the anlge of refraction is __

Define angle of incidence and angle of refraction.

In an experiment to study the refraction of light through a rectangular glass slab, a student measured the angle of incidence, angle of refraction and the angle of emergence, The student lost the reading of angle of incidence but noted the readings of angle of refraction to be 35^(@) and angle of emergence to be 65^(@) . The angle of incidence is likely to be :

The ratio of sine of angle of incidence in one medium to sine of angle of refraction in other medium is

Write the relation between the angle of incidence and the angle of refraction for a medium.

A ray of light travels from air to glass . It is found that the angle of refraction is half the angle of incidence . Then the angle of refraction is given by

If the angle of incidence is 0^(@) , the angle of refraction is 90^(@) .