Question

a. What is light intensity?
b. What do we need to measure light intensity?

(Please answer a and b correctly and I will mark you brainliest)

Answer 1

$\huge\mathfrak{Answer}$

What is light intensity?

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, an SI base unit. 

What do we need to measure light intensity?

Lighting professionals use a light meter (also called an illuminance meter or lux meter) to measure the amount of light in a space/on a particular work surface

Answer 2

Answer:

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, an SI base unit.

What do we need to measure light intensity?

Lighting professionals use a light meter also called an illuminate meter or lux meter to measure the amount of light in a space/on a particular work surface