Question

what is relation between velocity frequency and waveter length​

Answer 1

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The wavelength and frequency of light are closely related. The higher the frequency, the shorter the wavelength. Because all light waves move through a vacuum at the same speed, the number of wave crests passing by a given point in one second depends on the wavelength.

Answer 2

All sounds travel with the same speed in air regardless of their frequency. The velocity of light in vacuo is also independent of frequency; in a transparent medium, however, the velocity of light depends on the effect of dispersion in the varying.