Light travels through a glass plate of thickness t and having a refractive index μ. If c be the velocity of light in vaccum, the time taken by light to travel this thickness of glass is :
A. \(\frac{\mathrm{t}}{\mathrm{c}} \mu\)
B. \(\frac{\mathbf{t}}{\boldsymbol{\mu c}}\)
C. \(\frac{\mathrm{t}}{\mu} \mathrm{c}\)
D. \(\text { t } \mu \mathrm{c}\)
Answer:A
Light travels through a glass plate of thickness t and having a refractive index μ. If c be the velocity of light in vaccum, the time taken by light to travel this thickness of glass is :
A. \(\frac{\mathrm{t}}{\mathrm{c}} \mu\) B. \(\frac{\mathbf{t}}{\boldsymbol{\mu c}}\) C. \(\frac{\mathrm{t}}{\mu} \mathrm{c}\) D. \(\text { t } \mu \mathrm{c}\)