Question

What is the frequency of light emitted by a helium-neon laser with a wavelength of 632.8 nm? (`c = 3.00 x 10^8`)

Answer 1

`f = 4.74xx10^14" Hz"`

Explanation:

Given: `lambda = 632.8xx10^-9" m"` and `c = 3.00xx10^8" m/s"`

Let `f =` the frequency

`f = c/lambda`

`f = (3.00xx10^8" m/s")/(632.8xx10^-9" m")`

`f = (3.00xx10^8" m/s")/(632.8xx10^-9" m")`

`f = 4.74xx10^14" Hz"`