Question

What is the wavelength of radio waves that have a frequency of 3.20 x 1010 Hz?

Answer 1

The correct answer is A; or 9.38x10^-3.

Explanation:

f=3.20x10^10       c= 3.00x10^8

Once you divide those by each other, your answer is 9.83x10^-3

Hope this helps!! :)

Answer 2

The wavelength of the radio waves is $9.38 \times 10^{{3} m$

Explanation:

Given:

Frequency= 3.20 x 1010 Hz

Wave speed or speed of light= $3.00\times10^8$

To Find:

Wavelength of radio waves= ?

Solution:  

Wavelength of radio waves  is mathematically expressed as

$\lambda= \frac{c}{f}$

where

f = frequency

c= wave speed or speed of light

$\lambda$ = wavelength of radio.

So,

$\lambda=\frac{c}{f}$

$\lambda= \frac{3.00\times10^8}{ 3.20 \times10^{10}}$

$\lambda=0. 938\times 10^ {{-2}$

$\lambda= 9.38\times 10^ {{-3}$