Demetrius3D

Demetrius3D t1_iy9jnto wrote

When I used to do bumper stickers, I would buy magnetic vent cover sheets and stick the bumper sticker to the magnet sheet. Then, I could stick the magnet to the car and swap out bumper stickers at will. The magnet sheets come with a white layer on front. If you peeled off that layer carefully, there would probably be enough adhesive residue to hold the bumper sticker in place. Or, you could use a spray adhesive. ...This is all probably more expensive than just buying a new sticker, though.

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Demetrius3D t1_iuezi6o wrote

Light gets refracted every which way in a rainbow thru water droplets in the air - depending on the wavelength of light and the angle it passes thru a water droplet. But, in the center of the rainbow, refracted wavelengths or colors combine with refracted colors from other droplets to make white light again. That's why the center of a rainbow is often brighter than the surrounding sky. The bands of colors we think of as a rainbow are just the edge where colors are refracted at angles that don't combine with other colors.

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