Ice crystals refract light. That’s what causes a sun dog. But when a rocket goes supersonic and vibrates the ice crystals in a cirrus cloud, the effect we see is even more astounding. I’ve never seen this effect, and I think it’s pretty cool.
This video isn’t conventional computer tech. And yet’s immensely technical, invoking a principle of physics. Gotta love that. And so, if you’re camping, don’t have matches, can’t find a flinty rock and can’t get your campfire started for a cold night to come, here’s a really cool demo. What you need is some pulverized wood, a clear plastic sandwich bag, and some water from a nearby stream. Or your cooler. Sound impossible, Mr. MacGyver? Check it out.
Here’s the blurb from Mashable: “In 2014, researchers in the UK created the darkest material in the world known as ‘Vantablack.’ Now, they’ve created a spray-on version. Vantablack is so dark that it distorts the shape and form of the objects on which it’s painted.” Absorbing 99.965 percent of visible light, this coating reflects so little, it creates new optical illusions, disguises shapes, and tricks the human eye. You’ve never seen nothing like this. Wile E. Coyote helps with the demonstration.