This is refraction. Light is both bent and split into primary colours.
This is also the album cover for Pink Floyd's Dark Side of the Moon. This is an imperfect picture.
Putting together a science lesson on rainbows, including refraction.
Why is your vision worse in water?
Your vision is worse in water because of refraction, the light being bent in that different, denser medium. After seeing the video I think I misunderstood how vision works. There are two solutions to the water
refraction problem. One is to use goggles in water, so that it is air next to your cornea. The other is to have a thick lens, like a literal fish eye. Would a camera fish eye work under water?
The thumbnail shows him looking under water, blowing bubbles that will provide a layer of air under his eyes.
This is refraction. Light is both bent and split into primary colours.
This is also the album cover for Pink Floyd's Dark Side of the Moon. This is an imperfect picture.
This is refraction. The light bends. So shouldn't it produce a spectrum? I can't spot it.
Yes, it does produce a spectrum. But I tried, and couldn't produce it. I put a light in a box with a hole and fired the light through the glass. Hmm ..
So what's going on under the hood with refraction?
How well do you understand refraction?
YouTube short. This shows why light bends in a denser (transparent) material. The original video is here. This is the 3Blue1Brown mentioned by Veritassium.
This shows why light slows down in a denser (transparent) material.