Question

If the frequency of a wave is kept constant and the wavelength increases does the wave speed increase or remain constant?

Answer 1

It increases.

Explanation:

Speed of wave is given by the formula

`"v = f λ"`

If frequency `("f")` is kept constant then

`"v ∝ λ"`

From above, if wavelength `(λ)` is increased then speed of wave too will increase.

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It happens during refraction of light.