Light is incident from glass ( = 1.50 ) to water ( = 1.33 ). Determine the range of the angle of deviation for which there are two angles of incidence.

Step-by-step solution

The critical angle _c for light traveling from glass to water is given by: _c = _w _g = 4/3 3/2 = 8 9 _c = ⁻¹ ( 8 9 ) When the angle of incidence i is less than the critical angle ( 0 i ₁ = 2 - _c When the angle of incidence i is greater than or equal to the critical angle ( _c i /2 ), total internal reflection (TIR) occurs. The angle of deviation is given by = - 2i . As i increases from _c to /2 , the deviation decreases from a maximum of - 2 _c to 0 . The range of deviation for refraction is [0, /2 - _c) and for