Physics · 2026
JEE Main · 22 January 2026, Shift 2 · Q40
The wavelength of light, while it is passing through water is 540 nm. The refractive index of water is 4 / 3. The wavelength of the same light when…
The wavelength of light, while it is passing through water is $\displaystyle 540$ nm. The refractive index of water is $\displaystyle 4 / 3$. The wavelength of the same light when it is passing through a transparent medium having refractive index of $\displaystyle 3 / 2$ is $\displaystyle \_\_\_\_$ nm.
Official answer
From NTA’s final answer key for this paper.
(4)
$\displaystyle 480$
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JEE Main 2026 Physics question, with the answer from NTA’s final answer key. Where our answers come from.