Posts Tagged ‘Physics’

Light Speed – fast, but slow

October 11, 2019

Light travels at 299 792 458 m/s.

If you could travel at the speed of light, you could go around the Earth 7.5 times in one second. Which is fast, but…

Seeing the Invisible

June 18, 2017

This is what the world would look like if you could see invisible air currents, temperature gradients, and differences in pressure or composition of the air.

Bullet Proof Glass – for real

January 9, 2017

Prince Rupert’s Drops are toughened glass beads created by dripping molten glass into cold water, which causes it to solidify into a tadpole-shaped droplet with a long, thin tail. These droplets are characterized internally by very high residual stresses, which give rise to counter-intuitive properties, such as the ability to withstand a blow from a hammer or a bullet on the bulbous end without breaking, while exhibiting explosive disintegration if the tail end is even slightly damaged.

They are AMAZING! Check them out …


Is radiation dangerous?

March 16, 2016

When we hear the word radiation, it’s tempting to picture huge explosions and frightening mutations. But that’s not the full story — radiation also applies to rainbows and a doctor examining an X-ray. So what is it, really, and how much should we worry about its effects?

The Problem With Invisibility Is The Blindness

March 12, 2016

Invisibility is one of those science fiction superpowers, along with flight or super speed, that almost everyone has at least dreamt of having. In our current age, with the emerging science of metamaterials, invisibility seems closer than ever to becoming a reality. But there is still one problem: if a person achieved true, perfect invisibility, they would probably be blind!


In terms of invisibility our best hope yet of one day disappearing entirely is by bending light around us.

To get light to bend around a space or object and seamlessly come back together on the other end is no easy feat. But even if we could do it, there’s another problem. You’d be invisible to others, sure, but you couldn’t see anything.

Since your vision is based on the light rays that enters your eyes, if all of these rays were diverted around someone under an invisibility cloak, the effect would be like being covered in a thick blanket. Total darkness. Learn more here.

Gravitational Waves Explained

February 12, 2016

You may have heard that scientists have directly observed gravitational waves for the first time.

If that sounds confusing, this clip may help …

The physics behind this crazy basketball trick

July 18, 2015

Let’s play a little game called “What happens when you drop a basketball off the top of a 126.5-metre dam?” The answer’s pretty obvious: it’s going to fall, right? But what happens if you give it a little backspin before you let go? Well, that’s a whole different story, as you can see …

Learn more here.

The math behind Michael Jordan’s legendary hang time

June 6, 2015

Michael Jordan’s legendary slam dunk from the free throw line has been calculated at 0.92 seconds of pure hang time. But how many seconds could Jordan have gotten were he doing the same jump on the Moon? Or Jupiter?

How batteries work

May 23, 2015

Batteries are a triumph of science—they allow smartphones and other technologies to exist without anchoring us to an infernal tangle of power cables. Yet even the best batteries will diminish daily, slowly losing capacity until they finally die. Why does this happen, and how do our batteries even store so much charge in the first place?

Sunlight is way older than you think

May 15, 2015

So it turns out that light from the very core of our Sun actually takes around 170 years (and 8 minutes) to reach Earth!

See why …