When a light wave enters from air into water, | vedclass

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(C) When a light wave travels from one medium to another, its frequency remains constant because it is determined by the source of the light. However,

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Frequency

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(C) When a light wave travels from one medium to another, its frequency remains constant because it is determined by the source of the light. However, the speed $(v)$ and wavelength $(\lambda)$ of the light change depending on the refractive index of the medium. Since the speed changes, the wavelength also changes according to the relation $v = f \lambda$. The amplitude may change due to reflection or absorption at the interface. Therefore, the frequency is the only quantity that remains unchanged.

When a light wave enters from air into water, which quantity does not change?

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