Category Archives: — By the Physicist

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 | 7 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

Q: In base ten 1=0.999…, but what about in other bases? What about in base 1?

Physicist: Yup! The “0.999… thing” has been done before, but here’s the idea.  When we write 0.9, 0.99, 0.999, 0.9999, etc. we’re writing a sequence of numbers that gets closer and closer to 1.  Specifically, if there are N 9’s, … Continue reading

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

Q: How many samples do you need to take to know how big a set is?

The Original Question Was: I have machine … and when I press a button, it shows me one object that it selects randomly. There are enough objects that simply pressing the button until I no longer see new objects is … Continue reading

Posted in -- By the Physicist, Combinatorics, Math, Probability | 3 Comments

Q: Does anti-matter really move backward through time?

Physicist: The very short answer is: yes, but not in time-traveler-kind-of-way. There is a “symmetry” in physics implied by our most fundamental understanding of physical law, and is never violated by any known process, that’s called the “CPT symmetry“.  It … Continue reading

Posted in -- By the Physicist, Particle Physics, Physics, Skepticism | 4 Comments