The beam from a laser is focused with a lens, reducing the area of the beam by

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The beam from a laser is focused with a lens, reducing the area of the beam by a factor of 2 . By what factor does the amplitude of the electric field increase?

A. The amplitude does not change.

B. The amplitude increases by a fâctor of $\sqrt{2}$.

C. The amplitude increases by a factor of 2 .

D. The amplitude increases by a factor of $2 \sqrt{2}$.

E. The amplitude increases by a factor of 4 .

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College Physics A Strategic Approach

ISBN: 9780321907240

3rd Edition

Authors: Randall D. Knight, Brian Jones, Stuart Field

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Question Posted: Apr 03, 2024 05:00 AM

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The beam from a laser is focused with a lens, reducing the area of the beam by

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College Physics A Strategic Approach

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