Homework Help: physics

Posted by Anonymous on Monday, November 16, 2009 at 1:55pm.

If the frequency of oscillation of the wave emitted by an FM radio station is 89.8 MHz, determine the wave's wavelength.

This is what I did:

89.8 MHz = 89800000 Hz
v = lambda x f
lambda = v/f = 343 m/s/89800000 Hz = 3.82 x 10^-6 m

What am I doing wrong?

physics - bobpursley, Monday, November 16, 2009 at 2:05pm
You are using the velocity of sound instead of the velocity of light. There is a considerable difference in them.
physics - Anonymous, Monday, November 16, 2009 at 2:21pm
How do you know that the speed of light should be used.

I used the speed of sound because the question said, "radio station".

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