Our sun, currently a yellow dwarf, will eventually evolve to a red giant star and then to a white dwarf star as shown in the figure. Assume that the sun radiates like a blackbody. Calculate the power radiated by the RED GIANT sun if its surface temperature is 3000 K.

Our sun, currently a yellow dwarf, will eventually evolve to a red giant star and then to a white dwarf star as shown in the figure. Assume that the sun radiates like a blackbody. Calculate the power radiated by the RED GIANT sun if its surface temperature is 3000 K.

Inquiry into Physics

8th Edition

ISBN:9781337515863

Author:Ostdiek

Publisher:Ostdiek

Chapter12: Relativity, Particle Physics, And Cosmology

Section: Chapter Questions

Problem 15P

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Concept explainers

Wien's displacement law

Students often get confused between Wien's displacement law and Planck's radiation law. Although both are historically related, yet they are conceptually different. Planck's law helps determine the spectrum of a blackbody, while Wien's law determines the relationship between peak wavelength and temperature.

Question

Stefan-Boltzmann Law:
P(T) = σAT4
Sun
Yellow Dwarf
RYD
O 2.80 x 10^(29) W
O 6.99 x 10^(28) W
O 2.22 x 10^(28) W
O 6.49 x 10^(39) W
=
6.96 × 108 m
RRG
σ=
5.670x10-8 W/(m² · K4)
White Dwarf
RWD = 6 x 106 m
Red Giant
=
: 6.96 × 10¹0 m

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