Frequency of light is constant in all media.
In water with refractive index 4/3, wavelength is 540 nm.
The wavelength in vacuum is λ0=540×34=720 nm.
In a medium with refractive index 3/2, the wavelength is λ=3/2720=720×32=480 nm.
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 it is passing through a transparent medium having refractive index of 3/2 is ____ nm.
Held on 22 Jan 2026 · Verified 6 Jul 2026.
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