A star with surface temperature 20,000K emits energy at a rate of 2.74x 1021 w. Calculate the peak-intensity wavelength and radius of the star.
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Answer:
cording to Wien's displacement law,
λ
max
T=b
∴T=
λ
max
b
=
289.8nm
2898μmK
289.8×10
−9
m
2898×10
−6
mK
=10
4
K
According to Stefan Boltzmann law,
Radiation intensity, R=σT
4
R=(5.67×10
−8
Wm
−2
K
−4
)(10
4
K)
4
=5.67×10
8
Wm
−2
Explanation:
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