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.

Why We Should Be Worried About Apple Vision Pro

Inside Notre Dame | The Story of God

View All

Peter Lynch: Buy These 5 Types of Stocks (Rare Clip)

When most people think about investing in stock market, they dream about investing in a fast grower. A company that is growing at over 25 percent a year—at 25 a year a company’s profits will double in three, they quadruple in six, and up eightfold in nine…

The Moon

When you look at the Moon in the night sky, it might seem reasonably close, but it’s actually incredibly far away. Right over here is a scaled picture of the distance between the Earth and the Moon. Earth has a diameter of approximately 8,000 miles, while…

Why Do We Feel Nostalgia?

Hey, Vsauce. Michael here. Music. Why does music make us feel the way it does? Why does music make us wanna move? And why do songs sometimes get stuck in our heads? James May, from the YouTube channel Head Squeeze, thanks for the music. Pleasure. Why ca…

Warren Buffett: Buy These Inflation-Proof Businesses

Well, the businesses that will perform the best are the ones that require little capital investment to facilitate inflationary growth and that have strong positions that allow them to increase prices with inflation. And, well, those modest statements wer…

Analyzing mistakes when finding extrema example 2 | AP Calculus AB | Khan Academy

Aaron was asked to find if f of x is equal to x squared minus 1 to the 2⁄3 power has a relative maximum. This is her solution, and then they give us her steps, and at the end, they say, is Aaron’s work correct? If not, what’s her mistake? So pause this vi…

Looking back at the text for evidence | Reading | Khan Academy

Hello readers! Today I’m in a courthouse, watching people argue about laws so we can learn about the power of evidence. Evidence is essentially proof; it is the facts that help you know that something is true. Let’s listen in. “And your honor, that is wh…

This Is A Light-Nanosecond!

More Articles