(2) A 62 W (60 J/s) light bulb is 8.5% efficient, i.e. only 8.5% of the electrical energy it consumes (62 J each second) is converted to light and the rest is converted to waste heat. What is the light intensity 10 cm from the bulb in W/m2? (answer: 42 W/m2)

(2) A 62 W (60 J/s) light bulb is 8.5% efficient, i.e. only 8.5% of the electrical energy it consumes (62 J each second) is converted to light and the rest is converted to waste heat. What is the light intensity 10 cm from the bulb in W/m2? (answer: 42 W/m2)

An Introduction to Physical Science

14th Edition

ISBN:9781305079137

Author:James Shipman, Jerry D. Wilson, Charles A. Higgins, Omar Torres

Publisher:James Shipman, Jerry D. Wilson, Charles A. Higgins, Omar Torres

Chapter1: Measurement

Section: Chapter Questions

Problem 11E

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