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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)

davidperkins47657f profile image
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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