32. Electromagnetic Waves
The Electromagnetic Spectrum
9:04 minutes
Problem 44.18
Textbook Question
Textbook Question(III) Stars located in a certain cluster are assumed to be about the same distance from us. Two such stars have spectra that peak at λ₁ = 470nm and λ₂ = 720 nm, and the ratio of their apparent brightness is b₁/b₂ = 0.091. Estimate their relative sizes (give ratio of their diameters) using Wien’s law and the Stefan-Boltzmann equation, Eq. 19–17.
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