Period and frequency of a lightwave

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Homework Help Overview

The discussion revolves around calculating the period and frequency of a lightwave given its wavelength of 630nm. The subject area pertains to wave properties in physics.

Discussion Character

  • Mathematical reasoning, Assumption checking

Approaches and Questions Raised

  • The original poster attempts to calculate frequency and period using the wavelength, but questions arise regarding the accuracy of their calculations and the handling of powers of ten.

Discussion Status

Participants are actively engaging in identifying calculation errors and providing feedback on the original poster's attempts. Some guidance has been offered regarding the correct handling of units and calculations, with a focus on ensuring accuracy in the results.

Contextual Notes

There is an emphasis on the correct conversion of wavelength to meters and the proper use of scientific notation in calculations. The original poster's approach to using the equations for frequency and period is noted, but the accuracy of their calculations is under scrutiny.

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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