Jump to content

wavenumber conversion


Recommended Posts

Hi I was just wondering if you can help me out on this. Note: this isn't a homework question ok!


How you convert the wavenumber in cm^-1 into nm. I know if it said that you had to convert that wavenumber into nm^-1 it would be X 10^10. You people think that I might have to multiply it by 10^-10?


Any help appreciated.

Link to comment
Share on other sites

well actually i was going through it last night and I figured that we have to convert the wavenumber into frequency in nm so I used the formula V(bar) = 1/Lambda and made lambda the subject and got lambda = 1/V(bar).


That was 1/16300 which equalled 6.134 x 10^-5 cm. To change it into the nm scale i simply divided it by the power of 10 to -15 and the final answer came as 6.134 x 10^-15.


Now I don't know if its the right answer or not but my head said it is.

Link to comment
Share on other sites

All the unit conversions are done in the same way, whether the unit is in the numerator or denominator.


For example, I would do this unit conversion like:


[math]\frac{1}{cm} \cdot \frac{1 cm}{10^7 nm} = \frac{1}{10^7 nm}[/math]


where the cm in the numerator and denominator cancel each other out. Note that since 1 cm = 10^7 nm, that the [math]\frac{1 cm}{10^7 nm}[/math] is equal to multiplying the term by 1.

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.