Is light really light outside the human brain?

[zeromodz]

We know that color is a sensation in the brain from interpreting different wavelengths of light. Therefore, color does not actually exist in the real external universe. Why not take it a step further and say that the sensation of brightness is a human concept. Not that actual magnitude of brightness, but the notion of interpreting brightness just as we interpret colors.

What if the entire universe is completely black outside the human mind (Or any organism's mind), and light is just a wave with different frequencies that in reality, doesn't reveal anything? What do you think?

 

[Oldfart]

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What if the entire universe is completely black outside the human mind (Or any organism's mind), and light is just a wave with different frequencies that in reality, doesn't reveal anything? What do you think?

Well, it seems that "black" is a reasonable description if there is no mind or eye to perceive light from sources in the universe. But how do you blend instruments such as the HST into your thinking about this? Should we discount whatever it reveals to us? I'm confused...

OF

 

[Vanadium 50]

This line of reasoning is called solipism, it's almost 2000 years old, and it is not physics, it is philosophy. (And bad philosophy at that, because it's sterile - it doesn't teach us much that is useful).