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What is irradiance?
in Grade 12 Physical Sciences by Diamond (51,000 points) | 15 views

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Irradiance is the measure of the rate of energy transfer from a light source per surface area. The irradiance is a measure of the photons of light hitting a surface per second.

Since power = energy * time, irradiance is usually written as:

Irradiance = Power/Area

by Wooden (2,177 points)

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