The index of refraction for violet light in silica flint glass is 1.65 and for red light is 1.62.What is the angle of deviation for the red ray passing through a prism of apex angle 59.7 degrees. If the angle of incidence is 47.4 degrees.
nglass sine theta3 = nredlight sine theta4
nredlight sine theta1 = nglass sine theta2
Angle of deviation = [theta 1 + theta 4 ] - apex angle
The Attempt at a Solution
I know the equations to be used. but I dont understand the figure that accompanies this problem in the textbook. Can someone post a general picture, with all of these angles labeled and provide a starting thrust?