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The rate at which light energy is radiated from a source is measured in which of the following units? A. Lumen B. Candela C. Lux D. Angstrom
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The rate at which light energy is radiated from a source is measured in which of the following units?

A. Lumen
B. Candela
C. Lux
D. Angstrom

User Soeholm
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1 Answer

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The correct answer is A. Lumen

This is the so called energy of light measurement. Other mentioned measurements are used for different things such as measuring light over an area of space or similar.
User Hellomello
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