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light : Wavelength to wavenumbers
 

light : Wavelength to wavenumbers
by R on 02/16/05 at 18:04:55

Can't find these conversion (on this site)

nm to eV
nm to cm-1


this should be added .... ( or maybe i'm just blind!!)


thx


Re: light : Wavelength to wavenumbers
by Robert Fogt on 02/16/05 at 18:14:25

nm is a unit of length, while eV is a unit of energy or mass.

Is this for frequency?


Re: light : Wavelength to wavenumbers
by Robert Fogt on 02/16/05 at 18:18:06

Nevermind, did not read the subject very well before I answered.

wavenumber = 1/wavelength

I have added that to my to-do list. I will try to have something up soon. I am a bit behind, but I will have it up eventually.


Re: light : Wavelength to wavenumbers
by R on 02/16/05 at 20:18:46

Thank  you... for the nm  to cm-1 I was to convinced that there would be a constant of some sort somewhere that I didn't see the obvious....  

and for the nm to eV conversion , at first I was to lazy to make the calculation myself but now here's the formula

E (J) = c * h / lambda

where
c = 3E8 ms-1
h = 6.63E-34 js

and the joule to eV conversion is 1eV = 1,602E-19 J

(one eV is the energy gained by an electron when accelerated throught a difference of potential of 1V)
 


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