Question

Write short notes on luminance & Illuminance.

Answer 1

Luminance is quantified using a spectroradiometer, luminance meter or a chroma meter. Illuminance is a term that describes the measurement of the amount of light falling onto (illuminating) and spreading over a given surface area.

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Answer 2

Luminous has own light while non luminous has not own light and ex of luminous the sun,the torch and ex of non luminous table ,the moon .