Abeam of light has a wavelength of 650 nm in vacuum. (a) what is the speed of this light in a liquid whose index of refraction at this wavelength is 1.47? (b) what is the wavelength of these waves in the liquid?

The speed of this light and wavelength in a liquid are and 442 nm.

Explanation:

Given that,

Wavelength = 650 nm

Index refraction = 1.47

(a). We need to calculate the speed

Using formula of speed

Where, n = refraction index

c = speed of light in vacuum

v = speed of light in medium

Put the value into the formula

(b). We need to calculate the wavelength

Using formula of wavelength

Where, = wavelength in vacuum

= wavelength in medium

Put the value into the formula

Hence, The speed of this light and wavelength in a liquid are and 442 nm.