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

Posted:

**Fri Oct 05, 2007 10:27 am**how do i convert (cm)^-1 to joules!!!?????

Measurements Conversions, Metric Conversions

https://www.convert-me.com/en/bb/

Page **1** of **1**

Posted: **Fri Oct 05, 2007 10:27 am**

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

Posted: **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

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

Posted: **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.

E = planks constant x wavenumber x speed of light.

Posted: **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

Posted: **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

source:

A Critical Compilation of Atomic Transition Probabilities for Neutral

and Singly Ionized Iron

J. R. Fuhra… and W. L. Wiese