13.5 Light from the stars Flashcards
1
Q
What is Wien’s Law?
A
λmT = 2.9x10^-3
2
Q
What is temperature measured in in Wien’s Law?
A
Kelvin
3
Q
What is the constant and its unit in Wien’s Law?
A
2.9x10^-3 mk
metreKelvin
4
Q
What is the equation of the Stefan - Boltzman relationship? What does each symbol represent?
A
L = σAT^4 L = luminosity σ = constant (5.67x10^-8) A = surface area T = temperature (kelvin)
5
Q
What is the surface area of a sphere?
A
4𝛑r^2
6
Q
What is the name of the constant?
A
The stefan-boltzman constant
7
Q
What links luminosity and temperature?
A
L is proportional to T^4
8
Q
What do both Stefan - Boltzman and Wien’s Law strictly apply to ?
A
Black body radiators (all stars)
9
Q
What are black body radiators?
A
Objects that absorb any electromagnetic radiation falling on them
