Fri May 18, 2012 By: Vishnuraj

light rays of blue ,green and red wavelengths are incident on an isosceles right angled prism.explain with reason which ray will be transmitted through the face AC(hypotenuse).the refractive index of the prism for red ,green and blue light are 1.39,1.424,1.476 respectively

Expert Reply
Fri May 18, 2012
Angle of incidence is 450. Critical angles corresponding to these 3 values of refractive index is  sin 1/sin90=1/ 1.39 angle for 1.39 is 46 deg angle for 1.476 is 42 deg. As angle of incidence is greater than critical angle, the light will emerge through AC. This is true for red.
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