Copyright © Michael Richmond.
This work is licensed under a Creative Commons License.
Physics 212 Lecture: "Radiation."
Jan 9, 1997
- Radiation is the third way to transfer heat
- Energy is carried by electromagnetic waves,
or photons: two different ways of describing
the same thing
- Radiation can travel through empty space,
but may not be absorbed when it reaches its target
- Objects with emissivity close to 1.0 are good
absorbers and emitters
- Objects with emissivity close to 0.0 are poor
absorbers and emitters
- An object with emissivity = 1.0 is a "perfect blackbody",
or "blackbody" for short
- The Stefan-Boltzmann formula describes the amount of
energy transported by radiation
This lecture discusses material in Chapter 13 of Cutnell and Johnson.
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Copyright © Michael Richmond.
This work is licensed under a Creative Commons License.