Question

Which of the following is a unit for intensity of light?

• A. Candle power
• B. Lux
• C. Both A & B
• D. None of the above

Answer 1

The correct option is C Both A & B

In photometry, luminous intensity is a measure of the wavelength-weighted power emitted by a light source in a particular direction per unit solid angle, based on the luminosity function, a standardized model of the sensitivity of the human eye. The SI unit of luminous intensity is the candela (cd), an SI base unit.

Also, unit for intensity of light are:

(i) Candle Power

(ii) Lux