Question

What does the term 'radiance' refer to in radiometry?

• A. Energy per unit wavelength
• B. Energy per unit area
• C. Energy per unit area per unit solid angle
• D. Total energy emitted by a source

Hint:

Radiance = Energy per unit area per unit solid angle.

Answer 1

The Correct Option is C

Radiance is a radiometric quantity that describes the amount of energy passing through or emitted from a surface area in a given direction, per unit area per unit solid angle.