Category Archives: Physics

Spoiler: Mirrors don’t flip left and right.

Minute Physics: Why Do Mirrors Flip Left & Right (but not up & down)? (Youtube, 3:23min) “This video is about why words flip left & right (aka horizontally) in a mirror but not up & down (aka vertically). The answer has to do with specular reflection, mirrors being like windows into another world (alternate universes, just with in and out flipped!), and transparency of the things we write on.”

Probably the best explanations I’ve seen/heard about mirrors so far.

“Whoopie! Man, that may have been a small one for Neil, but that’s a long one for me.”

NPR Science: 50 Years Ago, Americans Made The 2nd Moon Landing… Why Doesn’t Anyone Remember?

“Fifty years ago, astronaut Pete Conrad stepped out of the lunar module onto the surface of the moon.

His first words were: “Whoopie! Man, that may have been a small one for Neil, but that’s a long one for me.”

Conrad, who stood at just 5 feet 6 inches tall, was only the third human to set foot on the lunar surface. He did it on November 19, 1969, just four months after Neil Armstrong and Buzz Aldrin made the first lunar landing. However, unlike Armstrong and Aldrin, Conrad and fellow astronaut Alan Bean are not household names.”

I have just one piece of advice: Don’t!

NASA Goddard: NASA’s Guide To Black Hole Safety. (YouTube, 2:39min) “Have you ever thought about visiting a black hole? We sure hope not. However, if you’re absolutely convinced that a black hole is your ideal vacation spot, watch this video before you blast off to learn more about them and (more importantly) how to stay safe.”

Link via Astronomy Picture of the Day.