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Ask a Spaceman!

AaS! 105: Is everything a wave or a particle, and why does my head hurt?

Ask a Spaceman!

Paul M. Sutter

Astrophysics, Science, Cosmos, Holes, Black, Astronomy, Natural Sciences, Universe, Cosmology, Space, Physics

4.8853 Ratings

🗓️ 4 June 2019

⏱️ 27 minutes

🧾️ Download transcript

Summary

Is light made of waves or particles? Is matter made of waves or particles? What does it mean for matter to “wave”, anyway? Why is this so hard to understand? I discuss these questions and more in today’s Ask a Spaceman!

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Music by Jason Grady and Nick Bain. Thanks to Cathy Rinella for editing.

Hosted by Paul M. Sutter, astrophysicist at The Ohio State University, and the one and only Agent to the Stars (http://www.pmsutter.com).

Transcript

Click on a timestamp to play from that location

0:00.0

If something seems weird, don't throw it away. No, it's an opportunity to expand your understanding.

0:16.7

Right? This is, this means your brain is breaking. And sometimes it's like if you break a bone and then keep it set, a new bone will appear in the gap. If you break your brain and then keep it open, sometimes new brain stuff can fill in and you can have a new understanding. Don't try that with real physical brains. This is just a metaphor. Just a metaphor. The reason I bring this up is the nature of the subatomic world is weird.

0:44.1

Deeply, fundamentally weird, so weird that it's almost impossible to describe with language.

0:54.6

But we don't understand the subatomic world through language, through English or German or French

1:02.9

or Thai or whatever. We understand the subatomic world through math. Mathematics. We use

1:09.0

mathematics to understand the subatomic, the quantum world. Quantum mechanics

1:12.8

is our mathematical description of really tiny stuff. And this, I think, highlights, it's, don't worry, I'm going to try to explain all this, But this highlights the power of mathematics, right?

1:31.5

And this is why science uses mathematics,

1:35.3

because math in science is a tool.

1:37.3

Like mathematicians use math and develop math

1:41.2

just for the fun of it, which is great.

1:44.0

Love them. Physicists pick and

1:46.3

choose from that buffet of things of logical structures and ways of organizing and et cetera,

1:54.1

et cetera, to solve problems, to describe nature, to make predictions. We have a set of mathematics,

2:02.1

several sets of mathematics that we use to describe the quantum world. And they're great. They accurately describe nature as

2:10.2

best we can. They make predictions that are verified by experiment. They do this, they do that.

2:16.4

It's a powerful, powerful way of describing the subatomic world.

2:21.0

But then we start talking about it, like on a podcast, where we try to wrap our heads around

2:27.8

it.

2:28.5

Like the math is crystal clear when it comes to quantum mechanics.

2:31.4

And then you start to talk about it because, you know, you want to put some words to it and words come up short. One of the biggest highlights of this

2:42.0

is something we call the wave particle duality. The wave particle duality is a fundamental concept

...

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