If the wavelength of light in vacuum be, the wavelength in a medium of refractive index

If the wavelength of light in vacuum be, the wavelength in a medium of refractive index µ will be

Options

(a) µλ
(b) λ / µ
(c) λ / µ²
(d) µ²λ

Correct Answer:

λ / µ

Explanation:

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