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22-12-2021
Physics

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You are looking at a yellow flower growing outside in the sunshine. Why does it look yellow?

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22-12-2021

Answer:

It looks yellow because that is the only (major) color reflected.

Visible spectra is from about 4000-7000 Angstroms (10^-10 m).

Red are longer wavelengths and blue are the shorter wavelengths.

The Sodium doublet (yellow) occurs around 5900 Angstroms.

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