SSC JE Electrical 16 Nov 2022 Shift 3 Paper

Question : 134 of 200

Marks: +1, -0

Which of the following statements regarding the absorption factor in lighting purposes is correct?

It is defined as the ratio of total lumens available after absorption to the total lumens emitted by the source of light.
It is defined as the ratio of the candle power before and after absorption of light.
It is defined as the ratio of utilisation factor to the depreciation factor.
It is defined as the ratio of the change in the brightness after the light has been absorbed by the surface.

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