A lamp emits light of frequency 5 10 15 Hz at a power of 25 W.

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A lamp emits light of frequency 5 × 10¹⁵ Hz at a power of 25 W. The number of photons given off per second is
a. 1.3 × 10^-19
b. 8.3 × 10^-17
c. 7.6 × 10¹⁸
d. 1.9 × 10⁵⁰

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The Physical Universe

ISBN: 978-0077862619

16th edition

Authors: Konrad B Krauskopf, Arthur Beiser

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Question Posted: Mar 11, 2020 07:12 AM

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A lamp emits light of frequency 5 10 15 Hz at a power of 25 W.

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The Physical Universe

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