Question

What is luminous intensity? What is 1 lumen? ​

Answer 1

Luminous intensity, the quantity of visible light that is emitted in unit time per unit solid angle. ... The unit of luminous intensity is one lumen per steradian, which is the unit of solid angle—there are 4π steradians about a point enclosed by a spherical surface

Answer 2

Answer:

Luminous intensity, the quantity of visible light that is emitted in unit time per unit solid angle. ... The unit of luminous intensity is one lumen per steradian, which is the unit of solid angle—there are 4π steradians about a point enclosed by a spherical surface.