At a certain angle of incidence, the refracted ray does not come out but grazes theinterface separating air and glass. Measurethe angle of incidence for this situation. Thisangle of incidence is known as.

At a certain angle of incidence, the refracted ray does not come out

1.	At a certain angle of incidence, the refracted ray does not come out but grazes theinterface separating air and glass. Measurethe angle of incidence for this situation. Thisangle of incidence is known as.
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.