Hown long (in meters) is a typical radio wave, which has a frequency of 88 megahertz?

Question

1. 3.4
2. 34
3. 340
4. 3,400
5. 34,000

Answer 1

The speed of wave propagation is a product of wave length L and frequecy f. since it propagates with the speed of light c then;
L=c/f
L= 3 E +8/ 88 E+6=3.4 m

so it is (1)

Answer 2

Radio waves, which are a type of electromagnetic radiation, travel in a vacuum, at the speed of light, which is 299,792,458 meters per second.

88 Megahertz is a frequency of 88 x 10^6 or 88,000,000 cycles per second.

If you divide the two you get a wavelength of about 3.4067 meters

Answer 3

The relevant equation here is:

speed of propagation = wavelength x frequency

the speed of all electromagnetic waves is 3x10^8 m/s

88 MHz = 8.8x10^7 cycles/sec

so the wavelength is then:

wavelength=3x10^8m/s/8.8x10^7 /s = 3.4 m