Which SI unit is used when dealing with the intensity of light?

A.

feet

B.

meters

C.

candela

D.

kilometers

Hello! The SI based unit for measuring the intensity of light is the candela. It’s defined as the luminous intensity in a direction that emits radiation of frequency and radiation intensity in the same direction. It’s replaced the standard candle as the unit. The answer is C: candela.

C. candela. this is the answer.