Recent comments in /f/explainlikeimfive

macanizales t1_iuethf1 wrote

You can attribute it to a few things. Astigmatism correction due to your eyes being compressed into a rounder shape at your lens, like squeezing a slightly oval balloon from the tied and opposite ends, the deepening of your lens due to the slight compression creates a stronger magnification, and your lashes reduce ambient light that could be creating a haze over the object you're focusing on.

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imgroxx t1_iuet8uv wrote

Counter question: are you sure they're in separate lines?

It looks like a continuous gradient to my eyes, I've never seen "bands".

There's more yellow and red than others to me, but I'm pretty sure that's largely because the middle is the most intense (you can easily see this with black and white photography) and red stands out more noticeably against the blue sky than the bluer half.

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wubrgess t1_iuet1xs wrote

Your lenses suck at focusing, that's why you need glasses. Focusing just means bending the light to go to a smaller point at a particular distance. Do you know what light doesn't need to be focused? Light that's already on its way to that point. So what happens when you squint? You're actually removing all the light that requires bending so what's left is the light that would already hit your retina correctly. You're effectively turning your eye into a pinhole camera

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LifeScienceInvestor t1_iueqvbn wrote

Systems of vibrations occurring within atoms that make up solids or liquids.

Example: I strike the end of a metal bar with a hammer. That hammer causes atoms at the stuck end to compress slightly, which, in turn, compresses the adjacent, non-compressed atoms. A compression wave (phonon) then travels along the bar, causing the opposite end to vibrate.

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