Question

AM radio signals use amplitude modulation of the radio waves to transmit a signal. A typical wavelength of an AM radio wave is 300. meters. What is the frequency of such a radio wave? a) 1.00 µHz b) 1.00 mHz c) 1.00 kHz d) 1.00 MHz e) 1.00 Hz

Answer 1

The frequency of such a radio wave is 1 MHz.

(d) is correct option

Step-by-step explanation:

Given that,

Wave length = 300 m

We know that,

Speed of light
`c= 3*10^(8)\ m/s`

We calculate the frequency

Using formula of frequency

`c = f*\lambda`

`f = (c)/(\lambda)`

Put the value into the formula

`f=(3*10^(8))/(300)`

`f =1*10^(6)\ Hz`

`f =1\ MHz`

Hence, The frequency of such a radio wave is 1 MHz.