question_answer

The frequency of a light ray is \[6\times {{10}^{14}}Hz.\]Its frequency when it propagates in a medium of refractive index 1.5, will be                                          [MP PMT 2000; DPMT 2003; Pb PMT 2003; MH CET 2004]

A)            \[1.67\times {{10}^{14}}Hz\] 

B)            \[9.10\times {{10}^{14}}Hz\]

C)            \[6\times {{10}^{14}}Hz\]       

D)            \[4\times {{10}^{14}}Hz\]