Three light rays red (R), green (G) and blue (B) are incident on a right angled prism \'abc\' at
Channel: Doubtnut
Date: 2020-01-03

Three light rays red (R), green (G) and blue (B) are incident on a right angled prism \'abc\' at face \'ab\'. The refractive indices of the material of the prism for red, green and blue wavelengths are 1.39 , 1.44 and 1.47 respectively. Out of the time three which colour ray will emerge out of face \'ac\' ? Justify your answer. Trace the path of these rays after passing through face \'ab\'