This Is A Light-Nanosecond!

less than 1m read

·Nov 10, 2024

I trimmed my beard yesterday, so I'm feeling a bit like a baby today. But look at the trimmings! Specifically this one that is 2.4 fortnits worth of beard growth. How do I know? Well, because of this tool I made. This about 5 years ago to free people from the tyranny of standard units. It measures in weird units like beard fortnits, the typical length of beard grows every 2 weeks.

It's also got light pico seconds, how far light travels in a trillionth of a second. If you didn't get one 5 years ago but you're subscribed much later this year, three boxes from now you'll get one in a special Legacy box we're making. The entire ruler is exactly one light nond long. This is how far light travels in a vacuum in 1 nond.

Everything I see from this distance, I'm seeing as it was a billionth of a second ago. It's a reminder that you live in the past because light has a finite speed. You do not see things as they are; you see the universe only as it was. Also, you're going nowhere if you fall asleep tonight in the same bed you woke up in this morning. Your average velocity for the day will be zero.

Heading Into an Ambush | The Long Road Home 360

Who Am I? | The Philosophy of Alan Watts

View All

My Life As an Adventure Filmmaker and Photographer (Part 2) | Nat Geo Live

Like any budding photographer, you know I was, of course, I got National Geographic magazine. That’s sort of the standard in photography. I remember when this issue came in the mail; it was called “Storming the Tower.” I read the story, and it was about f…

Where Are the Aliens?

Let’s talk briefly about the Fermi Paradox, since we’re talking about aliens. For those listeners who don’t know, Enrico Fermi was a famous physicist part of the Manhattan Project, and he said, “Where are the aliens?” The universe is so large; there’s pr…

Abiotic factors and an organism's range | High school biology | Khan Academy

So, let’s talk a little bit about abiotic factors for an organism’s range. Before we even get into it, let’s just think about what these words mean. In other videos, we’ve talked about how abiotic means non-living, while biotic would refer to living. So, …

Dave Ramsey Reacts To My $25 Million Dollar Investment

And there’s my debt: uh, four million twenty thousand dollars. Uh, it’s all five mortgages: 30-year fixed between 2.875 and 3.625. I mean, if you’re willing to let that kind of money just evaporate, I personally don’t do anything like that, so I never tho…

Official 2016 Trailer | Explorer

[Music] We’re heading out to the front, just a stone’s throw from Isis. This is the most at-risk coastline in the US. We could all go extinct. Back off! Don’t touch anything! Cult is not a negative thing if it c’s my head, and it does. These are criminals…

Reversible reactions and equilibrium | High school chemistry | Khan Academy

Let’s imagine a reaction where we start with the reactants A and B, and they react to form the products C and D. Now, it turns out that in certain situations, the reaction could go the other way. You could start with C + D, and those could react to end up…

This Is A Light-Nanosecond!

More Articles