Reading Comprehension (RC) | Light exists on a spectrum of frequencies extending from gamma rays

 

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I really have trouble seeing a causality here. Why is the fact that sun emitts at frequencies that the earth's atmosphere does not absorb an indication for a causality for the evolution of human sight? How can we infer this? We only know that sun's light is in visible spectrum and we know that humans can see it. What we don't know if the humans actually evolved to see the sun light. It surely can be assumed but inferred? ­

EDIT: Oh, sorry, there are 2 clear causality indicators. 

1. One reason we see the frequencies we do is that visible-spectrum light generally passes through our atmosphere without being absorbed or reflected.
2. Another reason is that the Sun, in some respects an average star, emits most of its light at frequencies at a visible spectrum.

Yesterday the question looked hard. Today not so much.
 
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Statistics : Posted by SergejK • on 21 Sep 2023, 10:30 • Replies 7 • Views 6984

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