Sir,(adsbygoogle = window.adsbygoogle || []).push({});

The question is as follows:

If excitation energy is provided by inelastic collisions between molecules, what is the temperature at which mercury vapour lamp will emit Ultra violet light of wavelength 2586 Angstrom?

I tried applying Wein's displacement law(lamda * T = 2.898 *10^(-3)metre-Kelvin . I got the answer as 11000 Kelvin. But the answer given in my book is 55000 Kelvin.Here the symbol ^ represents power.Please help me in solving this problem.

**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!

# Modern Physics

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