Question

Difference between direct radiation and diffuse radiation

Answer 1

Direct Radiation vs Diffuse Radiation. "Direct radiation" is also sometimes called "beam radiation" or "directbeam radiation". ... "Diffuse radiation", on the other hand, describes the sunlight that has been scattered by molecules and particles in the atmosphere but that has still made it down to the surface of the earth.

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Answer 2

All objects with a temperature above absolute zero (0 K, -273.15 oC) emit energy in the form of electromagnetic radiation. A blackbody is a theoretical or model body which absorbs all radiation falling on it, reflecting or transmitting none.