question_answer

A ray \[{{R}_{1}}\]is incident on the plane surface of the glass slab (kept in air) of refractive index \[\sqrt{2}\]at an angle of incidence equal to the critical angle for this air glass system. The refracted ray \[{{R}_{2}}\]undergoes partial reflection and refraction at the other surface. The angle (in degree) between reflected ray \[{{R}_{3}}\]and the refracted ray \[{{R}_{4}}\]at that surface is?

Answer:

105.00