Category Archives: — By the Physicist

Q: How can something have different amounts of energy from different points of view?

The original question was: … in a scenario with two cars driving towards each other, the system could be measured externally to have an energy equal to the sum of the kinetic energy in the two cars. However, if you … Continue reading

Posted in -- By the Physicist, Physics, Relativity | 29 Comments

Q: If light is a wave, then what’s doing the waving?

Physicist: In short: nothing.  Light acts like a wave, but unlike sound waves, light isn’t a material that’s moving back-and-forth. Waves are a coordinated movement of atoms.  A wave itself isn’t made of anything, it’s just a propagating motion through … Continue reading

Posted in -- By the Physicist, Experiments, Physics | 33 Comments

Q: If you’ve got different amounts of debt in different accounts with different interest rates, how should you pay them down?

Physicist: Focus on the one with the highest interest rate.  Get rid of it first, completely, before moving on to the next.  Debt is a like spiders.  If you can only kill a few at a time, kill the ones … Continue reading

Posted in -- By the Physicist, Math | 5 Comments

Q: Should we be worried about artificial intelligence? By “we” I mean humans.

Person: No.  Not at all.  Don’t give it a second thought. Behind every great triumph in artificial intelligence is a human being, who frankly should be feared more than the machine they created.  Most ancient and literal was the The … Continue reading

Posted in -- By the Physicist, April Fools | 25 Comments

Q: Why haven’t we been able to see the spectra of anti-hydrogen until recently? Why is it so hard to study anti-matter?

Physicist: Although anti-matter was first experimentally confirmed in 1932, no one has been able to see the atomic spectrum of any anti-elements until December 2016. The problem with anti-matter is that you can’t let it touch anything.  If you do: … Continue reading

Posted in -- By the Physicist, Particle Physics, Physics | 8 Comments

Q: Does quantum mechanics really say there are other “mes”? Where are they?

Physicist: As much of a trope as “Other Quantum Worlds” has become in sci-fi, there are reasons to think that they may be a real thing; including “other yous”.  Here’s the idea. Superposition is a real thing One of the … Continue reading

Posted in -- By the Physicist, Philosophical, Physics, Quantum Theory, Skepticism | 33 Comments