Stars Flashcards
1
Q
Steffens Law?
A
Pout (Luminosity) & T^4
2
Q
Inverse square law?
A
The power recorded per m^2 diminishes with the square of the distance. If distance ‘d’ to the sun doubles, the power received will fall to a quarter
I = L
4Pid^2
3
Q
21cm HI?
A
The wavelength of radiation emitted or absorbed when a hydrogen’s atoms electron when the electron flips its spin to be parallel or antiparallel to that of its nucleus