Question

Define CANDELA the unit of luminous intensity in simple words ?

Answer 1

Candela : The candela is the luminous intensity of a source, that emits a monochromatic radiation of frequency 540 x 10¹² hertz in a given direction, and that has a radiant intensity of 1/683 watt per steradian in that direction. Hence, a light measured at 120 candela is nearly equal to the light emitted by a 100 watt light bulb.

In rough language, a candela is nearly equal to the intensity of the light emitted by a regular candle.