You are standing 2.5 m from a 150-W lightbulb. (a) If thepupil of your eye is a circle 5.0 mm in diameter, how much energyenters your eye per second? (Assume that 5.0% of the lightbulb’spower is converted to light.) (b) Repeat part (a) for the case of a1.0-mm-diameter laser beam with a power of 0.50 mW.

You are standing 2.5 m from a 150-W lightbulb. (a) If thepupil of your eye is a circle 5.0 mm in diameter, how much energyenters your eye per second? (Assume that 5.0% of the lightbulb’spower is converted to light.) (b) Repeat part (a) for the case of a1.0-mm-diameter laser beam with a power of 0.50 mW.

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter16: Electromagnetic Waves

Section: Chapter Questions

Problem 79P: A computer user finds that his wireless router transmits data at a rate of 75 Mbps (megabits per...

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