Question

Light of wavelength 550nm in air is found to travel at 1.96

Answer 1

Answer:

ν = 5.45 x 10¹⁴ Hz

Explanation:

given,

wavelength of light = 550 nm

                                = 550 x 10⁻⁹ m

speed of light = 1.96 x 10⁸ m/s

speed of sound = 3 x 10⁸ m/s

frequency of the light = ?

we know.

$v = \nu \lambda$

frequency of the light in the liquid is same as the frequency of the light in the air.

 ν is the frequency of light

$\nu = \dfrac{v}{\lambda}$

$\nu = \dfrac{3\times 10^{8}}{550\times 10^{-9}}$

    ν = 5.45 x 10¹⁴ Hz

Hence, the frequency of light in the liquid is equal to ν = 5.45 x 10¹⁴ Hz