Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (4th Edition)

Published by Pearson
ISBN 10: 0133942651
ISBN 13: 978-0-13394-265-1

Chapter 37 - The Foundation of Modern Physics - Stop to Think 37.1 - Page 1067: 1

Answer

(a) represents emission spectrum and (b) represents absorption spectrum.

Work Step by Step

Every wavelength absorbed by gas is also emitted but not every emitted wavelength is absorbed. This implies that the number of lines in emission spectra should be higher than the number of lines in the absorption spectra. Hence (a) represents emission spectra and (b) represents absorption spectra.
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