You are standing 2.5 m from a 150-W lightbulb. (a) If the pupil of your eye is

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You are standing 2.5 m from a 150-W lightbulb.

(a) If the pupil of your eye is a circle 5.0 mm in diameter, how much energy enters your eye per second? (Assume that 5.0% of the lightbulb's power is converted to light.)

(b) Repeat part (a) for the case of a 1.0-mm-diameter laser beam with a power of 0.50 mW.

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Physics

ISBN: 978-0321976444

5th edition

Authors: James S. Walker

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Question Posted: Aug 31, 2017 12:19 PM

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You are standing 2.5 m from a 150-W lightbulb. (a) If the pupil of your eye is

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