question_answer

The refractive index of glass is 1.5 and speed of light in air is\[3\times 1010\text{ }cm/s\], the speed of light in glass is

A)  \[4.5\times {{10}^{10}}\text{ }cm/s\]    

B)  \[2\times {{10}^{10}}\text{ }cm/s\]

C)  \[0.5\times {{10}^{10}}\text{ }cm/s\]    

D)  \[1.5\times {{10}^{10}}\text{ }cm/s\]