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.

Horizons: Exploring the Universe (MindTap Course List)

14th Edition

ISBN:9781305960961

Author:Michael A. Seeds, Dana Backman

Publisher:Michael A. Seeds, Dana Backman

Chapter10: The Deaths Of Stars

Section: Chapter Questions

Problem 7P

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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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