Yuki Takeuchi: Difference between revisions
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'''ch1.3''' | '''ch1.3''' | ||
radiation is the energy carried by individual rays, but we need to consider the energy carried by sets of rays rather than individual ray because single ray essentially does not carry energy. | radiation is the energy carried by individual rays, but we need to consider the energy carried by sets of rays rather than individual ray because single ray essentially does not carry energy. | ||
Specific Intensity = describes the rate of radiative transfer of energy at a specific point P. | |||
Net Flux = integration of flux over solid angle with direction n. F = ∫IcosθdΩ | |||
Momentum flux = momentum flux along ray at angle θ is dF/c. and integrate it over solid angle. | |||
Radiative Energy Density | |||
Revision as of 18:59, 19 January 2012
1. FUNDAMENTAL OD RADIATIVE TRANSFER
Ch1.1 The spectrum correspond to waves which have various wavelength and frequency. λν=c Temperature and energy E=hν T=E/k
ch1.2 Flux = the measure of energy of all rays passing through a given area dAdt. Flux from isotropic source = assuming there are two spherical sources S and S' with radii r and r'. by conservation of energy, energy passing both elements are the same; F(r)*4πr^2 = F(r')*4πr'^2. => F= const/r^2 if S' is fixed.
ch1.3 radiation is the energy carried by individual rays, but we need to consider the energy carried by sets of rays rather than individual ray because single ray essentially does not carry energy.
Specific Intensity = describes the rate of radiative transfer of energy at a specific point P.
Net Flux = integration of flux over solid angle with direction n. F = ∫IcosθdΩ
Momentum flux = momentum flux along ray at angle θ is dF/c. and integrate it over solid angle.
Radiative Energy Density
to be continued...