What is the correct definition of reflectance?

Difference between amount of light absorbed by the surface and amount of light reflected.

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The amount of light reflected by a surface is known as reflectance.

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The ratio of the amount of the light reflected from a surface to the amount of light falling on the surface is called reflectance.

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The ratio of amount of light falling on a surface to the amount of light reflected on the surface is called reflectance.

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Solution

The correct option is C The ratio of the amount of the light reflected from a surface to the amount of light falling on the surface is called reflectance.
According to definition, ratio of the amount of light reflected from a surface to the amount of light falling on the surface is called reflectance.

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