Consider a hot sphere of gas that uniformly emits radiation in all directions. Assume that the intensity of light emitted is given by a constant source function, S. What fraction of the photons we see come from within one optical depth of the surface? (Hint: There is only one source of radiation producing photons here.)
Consider a hot sphere of gas that uniformly emits radiation in all directions. Assume that the intensity of light emitted is given by a constant source function, S. What fraction of the photons we see come from within one optical depth of the surface? (Hint: There is only one source of radiation producing photons here.)
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Transcribed Image Text:7. Consider a hot sphere of gas that uniformly emits radiation in all directions.
Assume that the intensity of light emitted is given by a constant source function,
S. What fraction of the photons we see come from within one optical depth of
the surface? (Hint: There is only one source of radiation producing photons
here.)
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