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Why magnetic field sensors can be anywhere - Video học tiếng Anh

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Why magnetic field sensors can be anywhere

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0:00I guess my question then is like, I'm

0:02I'm looking at you with my eyes, right?

0:03I'm I'm listening to you with my ears.

0:07Yeah. What are birds sensing magnetism

0:10[music] with?

0:11>> Great. Also, I love the way that you're

0:13asking these questions with a slightly

0:14confused tone. That is the right That is

0:16the right tone. Just to just to be

0:18clear.

0:19>> I have no idea how to even like wrap my

0:21I'm I'm going to let you have the

0:22magnetic field thing without asking like

0:2415 more questions on it. Yes. But yeah,

0:27I I

0:28What is in the bird that is getting them

0:31this information?

0:33>> The short answer is we don't know.

0:36>> Perfect.

0:37>> And [laughter]

0:37that's kind of astonishing. Just take

0:40vision. My eyes see. I can tell you

0:43exactly which molecules inside my eye

0:45are responsible for reacting to light

0:48and transforming that into an electrical

0:51signal that goes to my brain. That's all

0:53really worked out.

0:55>> Right.

0:55>> We don't have that for magnetoreception.

0:58And there are many reasons for that. One

1:00of the reasons is that with light,

1:04the stuff that we see, we know that

1:06light is [music] blocked by living

1:08matter. So any organ that detects light

1:10should be on the surface of the body or,

1:14you know, connected exposed to it by

1:16some kind of hole. The problem is that

1:18magnetic field permeates living matter.

1:22>> Right.

1:22>> So they just go through my body and

1:24they're not impeded by skin or bone or

1:27anything like that. And so a sensor that

1:30detects a magnetic field could be

1:32absolutely anywhere.

1:34>> [music]