Question

at a certain angle of incidence, the refracted
ray does not come out but grazes the
interface separating air and glass. Measure
the angle of incidence for this situation. This
angle of incidence is known as.​

Answer 1

Answer:

Explanation:

Now send light from the curved side of the semicircular glass disc. ... and measure the angle of refraction we will observe that at a certain incident angle the refracted ray does not come out but grazes the interface of incidence separating air and glenn is known as critical angle.