Question

A submarine uses sub-radio communication at 200 Hz. What is the wavelength of the electromagnetic waves in water with index of refraction 1.333?

Answer 1

Wavelength in water,
`\lambda=1.12* 10^6\ m`

Step-by-step explanation:

Given that,

A submarine uses sub-radio communication at 200 Hz.

The index of refraction, n = 1.333

The refractive index of a medium is given by :

`\mu=(c)/(v)\\\\\mu=(c)/(\lambda_m f)\\\\\lambda_m=(c)/(\mu f)\\\\\lambda_m=(3* 10^8)/(1.333* 200)\\\\=1.12* 10^6\ m`

So, the wavelength of the electromagnetic waves in water is
`1.12* 10^6\ m`.