Question

When the angle of incidence for light going from a denser medium to a rarer medium is exactly equal to the critical angle, the result is:

पर्याय

• light returns fully into the denser medium

• the refracted ray travels along the interface, with the angle of refraction equal to \[90^\circ\]

• no light travels either along or across the interface

• light refracts into the rarer medium with the angle of refraction less than the angle of incidence

Answer 1

At the critical angle, the refracted ray travels along the interface between the two media, which corresponds to an angle of refraction of \[90^\circ\]. This is the limiting condition beyond which total internal reflection begins.