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Questions about the Sun??

Ok, hopefully there are smart people out there because I really don't get this. Our Prof told us the sun's greatest electormagnetic output is right smack in the middle of the wavelengths we see as green. Since then I confirmed it in two different books - the greatest output is somenthing like 520 nm, which we see as green. Then he asked 2 questions:

  1. Why do we see a YELLOW sun?

  2. If most of the energy output is in the green wavelengths, why is that the ONE wavelength not absobed by plants? (That's why leaves are green - they are reflecting the green wavelength and using the energy from red, blue, etc wavelengths, which is inefficient.)

Anyone have any thoughts?

Answers (2)

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davidperkins47657f profile image
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jmvrjaeuaa profile image

well all it is a big ball of fire.&The Sun is, at present, about 70% hydrogen and 28% helium by mass everything else ("metals") amounts to less than 2%. This changes slowly over time as the Sun converts hydrogen to helium in its core.

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