Posted by hewitt on Wednesday, November 30, 2011 at 7:10am.
I take we are taking about the visible spectra (Balmer Series)? The two spectra have similar number of lines as below, although some are very feint. That a line apears in the visible spectrum will depend on the separation of the energy levels. We do not see transitions to level 1 for hydrogen or helium because the energy is too high and these appear in the UV. At the other end of the visible spectrum the Paschen series appear in the infrared.
Helium
wavelengths (nm)
438.793
443.755
447.148
471.314
492.193
501.567
504.774
587.562
667.815
Hydrogen (nm) transition
383.5384 9 -> 2 Violet
388.9049 8 -> 2 Violet
397.0072 7 -> 2 Violet
410.174 6 -> 2 Violet
434.047 5 -> 2 Violet
486.133 4 -> 2 Bluegreen (cyan)
656.272 3 -> 2 Red
Related Questions
Physics - What type of spectrum is produced by a hydrogen gas when a high ...
Physics - Hydrogen Emission spectrum - a) Describe the emission spectrum of a ...
Earth Space Science - What type of motion would have to occur to move or ...
chemistry - The red line in the Helium spectrum is longer than the red line in ...
Emission Spectrum of hydrogen ...CHEM - Can someone please explain the emissiom ...
Physics - Hydrogen discharge tube - a) Describe the emission spectrum of a ...
Physics - If the electron in a hydrogen atom obeyed classical mechanics instead ...
Physics - A transmission diffraction grating with 600 lines/mm is used to study ...
Physical Science Question 2 - What is the electromagnetic spectrum? Give ...
chemistry - What is the spectra/spectrum (?) of the following gases? -helium -...
For Further Reading
