Which of the following statements is TRUE?
A. The blackbody spectrum peaks at a longer wavelength for a red supergiant than for a blue main sequence star.
B. Helium absorption lines only appear in the coolest main sequence stars.
C. The blackbody spectrum peaks at a shorter wavelength for a red supergiant than for a blue main sequence star.
D. The blackbody spectrum peaks at a longer wavelength for a red supergiant than for a red main sequence star of the same spectral class.
E. The blackbody spectrum peaks at a shorter wavelength for a red supergiant than for a red main sequence star of the same spectral class.
Ans; A. The blackbody spectrum peaks at a longer wavelength for a red supergiant than for a blue main sequence star.
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