Everything is Made of Atoms (But It’s Mostly Nothing)

I want to start with a personal observation. Look at your hand. Then the wall. Both are solid, right? You can't stick your hand through the wall, but why not? This
A collection of 3 posts
I want to start with a personal observation. Look at your hand. Then the wall. Both are solid, right? You can't stick your hand through the wall, but why not? This
Imagine shining a flashlight at a wall with two narrow vertical slits in it. Behind that wall is a second wall that acts like a screen to catch the light. What would you
To ensure there are no misunderstandings; "light" as we will use it in this article, is defined simply as "illumination". Light radiates from its source outward until it reflects