Stars Flashcards

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1
Q

Steffens Law?

A

Pout (Luminosity) & T^4

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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

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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

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