A prism of crown glass with refracting angle of 5^ and mean refractive index =1.51 is combined with a flint glass prism of refractive index =1.65 to produce no deviation. Find the angle of flint glass.

Step-by-step solution

Let A^ be the angle of flint glass prism. Here, A =5^ and =1.51 for crown glass prism. Deviation produced by flint glass, ^ =( -1) A =(1.51-1) 5=2.55^ For no deviation, ^ = Or 0.65 ~A ^ =2.55 A ^ = 2.55 0.65 =3.92^