# Period and frequency of a lightwave

## Homework Statement

If a lightwave has a wavelength of 630nm, what is the period and frequency?

F=c/v
T=1/F

## The Attempt at a Solution

F = 3x10^8/6.3x10^-7 = 4.76Hz

T = 1/F = 1/4.76 = 0.21s

Am I correct or way off? I converted the wavelength to meters hoping this was correct

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Converting the wavelength to meter is correct, but you are still way off. Take a look at your powers of 10 again.

Yeah menco, there is a calculation error and nothing else.

Ah yes i forgot to put it in brackets on the calculator. I had another try and got

4.76x10^14 Hz and 2.1x10^-15 seconds

2.1x10^-15 seconds
2.1 x 10-15 s-1 ,, not just s

Seconds is ok. The result looks good menco.