Yuki Takeuchi

1. FUNDAMENTAL OD RADIATIVE TRANSFER Ch1.1 Electromagnetic Spectrum Elementary Property 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 What do we need to consider? => the energy carried by sets of rays rather than individual ray.

the energy crossing dA in time dt => dE = IdAdtdΩdν (I = specific intensity / brightness)

to be continued...