Period and frequency of a lightwave

AI Thread Summary
A lightwave with a wavelength of 630 nm has a frequency calculated using the equation F = c/v, resulting in 4.76 x 10^14 Hz after correcting calculation errors. The period, derived from T = 1/F, is approximately 2.1 x 10^-15 seconds. Initial calculations were incorrect due to mismanagement of powers of ten. Converting the wavelength to meters was confirmed as the correct approach. The final results for frequency and period are accurate and accepted by participants in the discussion.
menco
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Homework Statement


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


Homework Equations


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
 
menco said:
2.1x10^-15 seconds

2.1 x 10-15 s-1 ,, not just s
 
Seconds is ok. The result looks good menco.
 
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