What kind of spectrum is observed in (a) light from the hot filament of a lightbulb; (b)

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What kind of spectrum is observed in

(a) light from the hot filament of a lightbulb;

(b) light from a sodium-vapor highway lamp;

(c) light from a lightbulb surrounded by cool sodium vapor?

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The Physical Universe

ISBN: 978-0077862619

16th edition

Authors: Konrad B Krauskopf, Arthur Beiser

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