The rate of energy emission from unit surface area through unit solid angle, along a normal to the surface, is known as

A Emissivity
B Transmissivity
C Reflectivity
D Intensity of radiation

Correct Answer: Intensity of radiation

The intensity of radiation is defined as the rate of emission of radiation in a given direction from a surface per unit solid angle and per unit projected area of a radiating surface on a plane perpendicular to the direction of radiation.
Bissoy MCQ
#Mechanical Engineering #Heat And Mass Transfer

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