Question

A Ray of light is incident at 45 degree on one face of a rectangular slab of transparent material the refracted ray is incident on the adjacent side of the slab on the inside and is reflected at grazing incidence find the critical angle of the ray and mu for the material

Answer 1

a ray of light is incident at 70° on one face of a rectangular transparent slab of a material.The refracted ray is incident on adjacent side of the slabon the in side and reflected from it .If the reflected ray just emerges grazing the side,find critical angle and ref.index for the material