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How is radiance measured?

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in Digital Image Processing by (701k points)
How is radiance measured?

(a) lumens

(b) watts

(c) armstrong

(d) hertz

This question was addressed to me in a national level competition.

The query is from Light and the Electromagnetic Spectrum topic in chapter Digital Image Fundamentals of Digital Image Processing

1 Answer

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Correct option is (b) watts

The explanation: Radiance is the total amount of energy that flows from the light source and is measured in Watts.

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