Rainbows form when light enters a droplet at a 42° angle, is refracted and then reflected by the back of the droplet

By News on the Net -- Science girl (@gunsnrosesgirl3) —— Bio and Archives June 4, 2023

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Rainbows form when light enters a droplet at a 42° angle, is refracted and then reflected by the back of the droplet.

seawater has a higher refractive index compared to rainwater, so sea spray results in a rainbow with a shorter arc

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— Science girl (@gunsnrosesgirl3)June 4, 2023