Question

What is the frequency of an x-ray that has a wavelength of `1.5*10^-10` m?

Answer 1

The frequency is `=2*10^18Hz`

Explanation:

Apply the equation

`"Frequency" xx " Wavelength "= " Speed"`

`fxx lambda=c`

The wavelength is `lambda=1.5*10^-10m`

The speed is `c=3*10^8ms^-1`

The frequency is

`f=c/lambda=(3*10^8)/(1.5*10^-10)=2*10^18Hz`