Atomic Spectra


Helium spectrum
Argon
Hydrogen
Helium
Iodine
Nitrogen
Neon
Mercury
Sodium

At left is a helium spectral tube excited by means of a 5000 volt transformer. At the right of the image are the spectral lines through a 600 line/mm diffraction grating.

Helium
wavelengths (nm)
438.793 w
443.755 w
447.148 s
471.314 m
492.193 m
501.567 s
504.774 w
587.562 s
667.815 m
s=strong, m=med,
w=weak
Helium energy levels
Index

Reference
Jenkins & White
Ch. 21
 
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Atomic Spectra


Nitrogen spectrum

Argon
Hydrogen
Helium
Iodine
Nitrogen
Neon
Mercury
Sodium

The nitrogen spectrum shown above shows distinct bands throughout the visible range. The blue lines in the above were brightened for greater visibility in the image.

Index
 
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