Question

light traveld from air to water if frequency of light in air is'f' then frequensy of light in water is?
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Answer 1

Answer:

As light moves from air into water, it not only slows, but the wavelength changes. ... Interestingly enough, the frequency of the waves does not change as the light moves from air to water. As we saw in the Review page, the wave's speed v is related to both the frequency f and the wavelength : v = f.