Question

Question #6c2cd

Answer 1

Depends on the type of wave, but maybe `6.7\times10^{14} Hz`

Explanation:

We know the speed of a wave is given by the universal wave equation: `v=f\lambda` where `v` is the speed of the wave, `f` is the frequency, and lambda (`\lambda`) is the wavelength.

When you say "a wave of `4.5\times10^{-7}m`" I assume you mean the wavelength is equal to `4.5\times10^{-7}m`.

So if we want to find the frequency and we have the wavelength, we still need the speed of the wave (or perhaps some other data point we could use to find the speed). However, you haven't given the speed of the wave, so giving you an answer is difficult. Do you have any more data to go with the wavelength?

If it's a light wave, we can say the speed of light is `299792458 m / s`.

If you take that speed and divide by your given wavelength, you get `f=6.7\times10^{14} Hz`