Category: Math & Science

Light is energy, and it can be defined by four things: intensity (how bright), frequency (or wavelength), polarization (the direction of the electric Read More…

You can’t just shine a flashlight through a lens and call it a laser, because the way a laser generates light is what makes it a laser in the first Read More…

When it’s too hard to count ’em up and too much time to calculate, it’s time to guesstimate the answer. I use this technique all the time to “ball parRead More…

Burglar alarms not only protect your stuff, they put the intruder into a panic while they attempt to disarm the triggered noisemaker. This experiment Read More…

Pi is a number (slightly greater than 3) that shows up when you divide the circumference of a circle by its diameter, no matter what size the circle iRead More…

Most of the electricity you use comes from moving magnets around coils of wire. Electrical power plants either spin HUGE coils of wire around very powRead More…

Cryptography is the writing and decoding of secret messages, called ciphers. Now for governments these secret ciphers are a matter of national securitRead More…

What keeps building from toppling over in the wind? Why are some earthquake-proof and others not? We’re going to look at how engineers design buildiRead More…

One day, my kid asked me how a calculator comes up with its answers. That’s a great question, I thought. How does a calculator do math?
After thinkingRead More…