JEE Main 2022 · 25 Jul · Shift 1, Physics question 46

Time taken by light to travel in two different materials A and B of refractive indices $\mu_A$ and $\mu_B$ of same thickness is $t_1$ and $t_2$ respectively. If $t_2-t_1=5\times10^{-10}$ s and the ratio of $\mu_A$ to $\mu_B$ is 1 : 2. Then, the thickness of material, in meter is : (Given $v_A$ and $v_B$ are velocities of light in A and B materials respectively.)