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JEE-MAIN 2020
03-09-2020 S2
Question
Two light waves having the same wavelength $\lambda$ in vacuum are in phase initially. Then the first wave travels a path $L_1$ through a medium of refractive index $n_1$ while the second wave travels a path of length $L_2$ through a medium of refractive index $n_2$. After this the phase difference between the two waves is
Select the correct option:
A
$\frac{2 \pi}{\lambda}\left(n_2 L_1-n_1 L_2\right)$
B
$\frac{2 \pi}{\lambda}\left(\frac{L_1}{n_1}-\frac{L_2}{n_2}\right)$
C
$\frac{2 \pi}{\lambda}\left(n_1 L_1-n_2 L_2\right)$
D
$\frac{2 \pi}{\lambda}\left(\frac{L_2}{n_1}-\frac{L_1}{n_2}\right)$
✓ Correct! Well done.
✗ Incorrect. Try again or view the solution.
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JEE Main
Physics
Easy
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