Conceptual Physics (12th Edition)

Published by Addison-Wesley
ISBN 10: 0321909100
ISBN 13: 978-0-32190-910-7

Chapter 30 - Reading Check Questions (Comprehension): 12

Answer

In an excited gas, light is emitted from electrons moving between discrete, well-defined energy levels in separated atoms. This results in some distinct frequencies of light.

Work Step by Step

When a solid is excited, the formerly well-defined energy levels are blended together due to interactions among atoms in close contact. The formerly distinct frequencies are smudged together. This is discussed on page 567-568.
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