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Visible lights ca be used in printers

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if their is too much light it can damage the retina.
this will happen when you look at something bright like the sun.
what part of the eye will the sun destroy if you look directly at it?

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Visible light waves are used in weapon aiming systems.

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It lets us see in the dark.

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Anything hot enough to glow.White light is actually made of range of colors.Our eyes only decent a tiny portion of light.