(1/4)
If we put a rectangular prism in front of a laser allows light to pass through even if it's slightly tilted. But,replace it with a ∆ prism and the light refracts at 90°.
if you stick 2 identical ∆ prisms together to form a rectangle,still bends at the same 90°.Why? See👇 (2/4)
When light enters a prism, it bends or refracts cuz the change in its speed as it passes from one medium to another. In a triangular prism,the angle of the prism is such that the light is refracted at angle greater than 45° (critical angle), so it exits the prism at a 90°.

(1/2)
★Humans don't live forever and we definitely can't travel crazy far.
•Like,our nearest star, Proxima Centauri, is over 4.35 light-years away from us, which would take us over 6300 years to get there with the tech we've got. (2/2)
★Check this out, if we tried to wrap our heads around a number bigger than Graham's Number, our brains would straight up implode into a black hole.
•This number is so big that there's not even enough stuff in the whole dang Universe to write it out. But it's a real ..

Look at this video a guy walking in the glowing water.
The water is glowing because of something called bioluminescence, which is when living organisms produce light. In this case, it's caused by tiny creatures called dinoflagellates, single-celled organisms.
(1/4) ★But why?🤔
So, when these dinoflagellates get disturbed,they emit bright green-blue light,creates a glowing effect in the water. Just like flashing a bright light to distract predators that might wanna eat them. They use bioluminescence as a defence mechanism to stay safe.(2/4)

So look at this "Limits of Our Universe" that's been going around. It's pretty fascinating.

1st minimum possible temperature is 0 Kelvin:— also known as absolute zero, and it's the point at which all molecular motion stops. Scientists believe that it's impossible ....(1/4) to go below 0 Kelvin, as it would violate the laws of thermodynamics.

2nd the smallest possible time is 5.39×10–⁴⁴ sec:—known as Planck time & it's the smallest unit of time that is meaningful within current understanding of physics. it's much smaller than a nanosecond (2/4)

I came across this vid. Look "Milk, Paint, and Oil Experiment" vid. It's amazing! You take a plate, pour some milk in, add some different colored paints, and then some oil. Let's try to understand the complex science behind it.

It happens because (1/4) First,the milk has fat and protein molecules that are evenly dispersed, the paint pigments are evenly dispersed too.

But when oil is added,it floats on top of the milk bcuzit's less dense. As it spreads out, lit pushes the paint pigments away from it,creating a swirling pattern.

10 Bad Technology Predictions:

Open Thread🧵 1/10
“Television won’t be able to hold on to any market it captures after the first six months. People will soon get tired of staring at a plywood box every night.”

-Darryl Zanuck, 20th Century Fox, 1946.