Stellar classification

IB Physics: Stellar classification

This is a good opportunity to revise some basic concepts.Students might not understand the relevance of the line spectra when calculating Doppler shift. Doppler shift takes place for all the wavelengths of light so the whole spectrum is shifted so would not look any different. It"s like looking at an escalator, if it shifts up by one step it looks exactly the same however if someone stands on the step you will see that...

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