IMathAS-libretexts

When light passes from air into water, the frequency of the light remains the same. What happens to the speed and the wavelength of light as it crosses the boundary in going from air into water?

Speed: Remains the same. Wavelength: Remains the same
Speed: Decreases. Wavelength: Increases
Speed: Decreases Wavelength: Decreases
Speed: Remains the same. Wavelength: Decreases
Speed: Increases. Wavelength: Remains the same

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