Find the frequency (ν); the wavelength (λ); and the energy (E) of the KSL-AM radio station 1160 kHz.

Answer 1

There are a few equations you should learn when working with frequency (ν), wavelength (λ), and energy (E).

c = λν where c = speed of light = ~3x10⁸ m/sec

E = hν where h = Plank's constant = 6.626x10^-34 J-sec

E = hc/λ

In the current problem, we are given the frequency as 1160 kHz

Converting to Hz, we have 1160x10³ Hz (and recall that Hz is the same as sec^-1) THIS IS THE FREQUENCY

We can now use E = hν

E = 6.626x10^-34 Js * 1160x10³ s-1

E = 7.7x10^-28 J

And to find wavelength, we can use c = λν

3x10⁸ m/s = λ(1160x10³ s^-1)

λ = 259 m