Question

If $v_1$ and $v_2$ are the speeds of light in the two media of refractive indices $n_1$ and $n_2$ respectively, then

• A. $\frac {v_1}{v_2} = \frac {n_1}{n_2}$
• B. $\frac {v_1}{v_2} = \frac {n_2}{n_1}$
• C. $\frac {v_1}{v_2} = \frac {n_1^2}{n_2^2}$
• D. $\frac {v_1}{v_2} = \frac {n_2^2}{n_1^2}$

Answer 1

Answer: (B)

$\frac {v_1}{v_2} = \frac {n_2}{n_1}$

Answer 2

The correct option is (B): $\frac {v_1}{v_2} = \frac {n_2}{n_1}$.