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.

2015 AP Calculus BC 2a | AP Calculus BC solved exams | AP Calculus BC | Khan Academy

THE JUMP BATTLE!!!

View All

YC SUS: Gustaf Alströmer and Eric Migicovsky discuss growth tactics

Exciting! Welcome to another week of Startup School. I’m joined this week by Gustav. You want to tell us a little bit about yourself? Maybe your background? Sure! So I work here at YC as a partner. I’ve been here for two and a half years. Before that, I …

Interpreting change in exponential models | Mathematics II | High School Math | Khan Academy

So I’ve taken some screenshots of the Khan Academy exercise interpreting rate of change for exponential models in terms of change. Maybe they’re going to change the title; it seems a little bit too long. But anyway, let’s actually just tackle these togeth…

The Warren Buffett Scandal That Nearly Destroyed Wall Street

In 1991, Warren Buffett, the world’s best investor and most humble billionaire, got caught up in the middle of a scandal that rocked Wall Street and nearly destroyed his personal reputation forever. U.S. Investment Bank Solomon Brothers, of which Buffett …

What EVERYONE Needs To Do With Their Money ASAP

What’s up you guys, it’s Graham here. So I want to begin this video on a very serious note. As many businesses and cities begin to shut down, cease operations, close schools, cut hours, and inevitably begin laying off workers, it’s really more important …

Equations with rational expressions | Mathematics III | High School Math | Khan Academy

So we have a nice little equation here dealing with rational expressions, and I encourage you to pause the video and see if you can figure out what values of x satisfy this equation. All right, let’s work through this together. The first thing I’d like t…

How Politicians Keep Getting So Rich

This is Representative Alan Lowenthal, a Democrat in California. He sits on the House Committee on Transportation and Infrastructure, which on the 6th of March 2020 released this report detailing the preliminary findings from an investigation into the Boe…

This Is A Light-Nanosecond!

More Articles