Question

Light is measured in-
(A) Meter
(B) Footcandle
(C) Lightyear
(D) None of these​

Answer 1

The correct option is (B) Footcandle

Explanation:

• Every physical quantity has a unit to measure it.

• In the same way, footcandle is used to measure the intensity of light. A footcandle is defined as one lumen per square feet and denoted by fc =lm/ft2

• These units are recognized internationally so that the units are consistent. These international units are called system international units (SI).

• In addition to SI units, there are some local units as well. Like Footcandle is United States customary units of light. The SI unit of light is Lux