Hi all!(adsbygoogle = window.adsbygoogle || []).push({});

I just joined the forums and hopefully my question is in the right place and isn't a lame one but I'm stuck so here goes:

I want to know how to calculate wavelength from a known distance and color for Helium. I need exact wavelength. I already have the ranges obviously. Usually it's wavelength=c/v but I don't have frequency so any help would be greatly appreciated. Thanks.

:)

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# calculate wavelength from a known distance and color for Helium

**Physics Forums | Science Articles, Homework Help, Discussion**