Question

Please explain so I can do it next time -

Answer 1

A communications satellite transmits a radio wave at a frequency of 5 x 10^9 hz. What is the signal's wavelength? Assume the wave travels in a vacuum.

Answer 2

Thanks in advance!

Answer 3

Just use \( c = \lambda f ,\) where c is light speed, \( \lambda\) is wavelength and \(f\) is frequency.

Answer 4

5 x 10^9 is the frequency correct?

Answer 5

Yes, problem says so.

Answer 6

You know c, right?

Answer 7

I don't, c = light speed I could look it up one moment

Answer 8

186,282 miles per second

Answer 9

or 299 792 458 meters / s

Answer 10

so I would use 299 792 458 m / s divided by 5 x 10^9 correct?

Answer 11

Right, or you can just use 300,000,000 m/s, because it's close to 299,792,458 m/s

Answer 12

So what's the answer?