(cm)^-1 to joules!!!?????

Disscussing old, rare, very specific or otherwise uncommon units and measurements

Moderator: convert-me.com

(cm)^-1 to joules!!!?????

Postby mkevb1 » Fri Oct 05, 2007 10:27 am

how do i convert (cm)^-1 to joules!!!?????
mkevb1
 

Postby Guest » Fri Oct 05, 2007 6:11 pm

In what context? The only context I can think of that makes any sense is the energy of a photon.

Inverse centimeters are sometimes used as a "wave number" the number of cycles of any electromagnetic wave in a centimeter (mostly used for infrared and light). It is a quasifrequency, as a real frequency would be the number of waves in one second or about 3 x 10^8 m. Hence real frequency is 3 x 10^10 greater than this wave number.

The energy of a photon is given by E = h*nu or h*c*/lamda where nu is frequency and lambda is wavelength. h is Planck's constant, Google for value
Guest
 

Postby YOURNEWGOD » Tue May 05, 2009 10:58 pm

To get from wavenumber (cm-1) to Joules is easy.

E = planks constant x wavenumber x speed of light.

:twisted:
YOURNEWGOD
 

Re: (cm)^-1 to joules!!!?????

Postby chemhelp » Wed Mar 09, 2011 12:15 am

same as above but speed of light needs to be in cm i think 3 x 10^10 cm/s as opposed to 10^8 m/s
chemhelp
 

Re: (cm)^-1 to joules!!!?????

Postby bahardoost » Sun Mar 11, 2012 11:40 pm

1 cm−1=1.986*10−23 J.

source:
A Critical Compilation of Atomic Transition Probabilities for Neutral
and Singly Ionized Iron
J. R. Fuhra… and W. L. Wiese
bahardoost
 


Return to Exotic units

Who is online

Users browsing this forum: Bing [Bot] and 1 guest

Our Privacy Policy       Cooking Measures Converter       Metric conversions