Question

a star with surface temperature 20000K emits energy at a rate of 2.74W.calculate the peak intensity wavelength and radius of star​

Answer 1

Explanation:

Answer

According 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