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Absorbtion spectra



A student has asked the following question which seems like a good
one to me:
If the black lines in an absorbtion spectra correspond to
individual wavelengths, then shouldn't they be too thin to be seen?
Any thoughts? Do they have a "width"?

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Gary Hemminger
Dwight-Engelwood School
315 E. Palisade Ave.
Englewood, New Jersey
07631
e-mail: hemmig@d-e.org
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