AP chemistry Homework?

Question

An FM radio station broadcasts at 98.0 MHz. Calculate the wavelength of the corresponding radio waves in meters. I missed a week of school and please help me.

Answer 1

98.0 MHz = 98.0 x 10^6 Hz = 9.80 x 10^7 Hz

(lambda) (nu) = (speed of light)

(x) (9.80 x 10^7 s^-1) = 3.00 x 10^8 m s^-1

x = 3.06 m

Answer 2

For waves in general, the speed of the wave equals the product of its frequency and wavelength.

speed = frequency x wavelength

wavelength = speed / frequency

The speed for radio waves is the speed of light.  All electromagnetic energy propagates at c.  

c = 3.00 x 10^8 m/s

wavelength = 3.00 x 10^8 m/s / 98.0 x 10^6 1/s

wavelength = 3.06 m