Answered: The illumination on a certain object…

The illumination on a certain object 2.5 m from the light source is 6,648 lux, using same light source, what is the illumination on the object at 5 m?

Glencoe Physics: Principles and Problems, Student Edition

1st Edition

ISBN:9780078807213

Author:Paul W. Zitzewitz

Publisher:Paul W. Zitzewitz

Chapter16: Fundamentals Of Light

Section: Chapter Questions

Problem 34A

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Question

1. The illumination on a certain object 2.5 m from the light source is 6,648
lux, using same light source, what is the illumination on the object at 5 m?

2. 100 foot-candle at 10 ft distance from point “P”. what is the intensity?

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