SGU Episode 392
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| SGU Episode 392 |
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| 19th Jan 2013 |
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| (brief caption for the episode icon) |
| Skeptical Rogues |
| S: Steven Novella |
B: Bob Novella |
R: Rebecca Watson |
J: Jay Novella |
E: Evan Bernstein |
| Guest |
M: Massimo Polidoro |
| Quote of the Week |
No facts are to me sacred; none are profane; I simply experiment, an endless seeker with no past at my back. |
| Links |
| Download Podcast |
| SGU Podcast archive |
| Forum Discussion |
Introduction
You're listening to the Skeptics' Guide to the Universe, your escape to reality.
S: Hello and welcome to the Skeptics' Guide to the Universe. Today is Tuesday, January 13, 2013, and this is your host Steven Novella. Joining me this week are Bob Novella,
B: Hey, everybody.
S: Rebecca Watson,
R: Hello, everyone.
S: Jay Novella,
J: Hey, guys.
S: And Evan Bernstein.
E: How's everyone tonight?
S: Good, how are you, Evan?
R: Super.
J: Good.
E: Fine. Thank you, thank you, fine.
S: Evan, I noticed you stopped your foreign language hellos.
R: That's true.
E: Well, are you saying that I should have kept that up as a regular segment? It was more of like an experiment.
S: No. I just noticed that you stopped.
R: We were just wondering if you ran out of languages. (laughter)
J: Evan, what are you experimenting with now?
E: (laughing) I'm not necessarily experimenting with anything right now, but, Steve, I'm glad you mentioned it. You sort of rekindled my memory on that. Perhaps I will bring that back, or try something a little bit different.
S: I wasn't trying to encourage you, I was just making an observation.
E: Very astute. Nothing gets by you, Doctor.
This Day in Skepticism (1:05)
R: Speaking of segments, this day in history, on January 19, 1915, one George Claude patented the electrodes used for neon lights, which was what allowed him to perfect the neon sign that quickly became ubiquitous.
B: Very ubiquitous. (laughter)
R: Yeah, and for a while he had monopoly on it because he was so good at the neon sign making. Do you guys know what the first neon signs made in the United States were?
J: Yeah, for beer.
E: Eat at Joe's.
R: Unfortunately
B: Open
R: It's way more boring than any of those. Well, maybe not more boring than "Open." Good guess, Bob. But, it was for a car dealership called Packard. So the sign just read "Packard." Boring. But they cost $1,250 each. Quite pricey.
B: Wow.
E: Wow.
R: They were extremely.
B: They must have been a sight, though.
R: Apparently, yeah.
B: I can imagine.
R: People would just stop and stare at them for hours because people were dumb back then. (laughter) Easily amused.
J: Speaking of cool things that cost thousands of dollars, just on a side note, Kingston came out with a one terabyte thumb drive, costs $2,000.
B: Yes. I saw that.
E: Two thousand dollars!
B: Two grand! Oh, my god.
E: Where are you gonna put that thing? Duhaaa. Doh.
J: It's a terabyte, guys. It's a terabyte. I would wear it around your neck.
E: I would lose that in about three days, I think.
R: Easily, yeah.
E: I should not have that device.
B: I would Velcro it to my body. I would not lose that.
R: I can't even have a one terabyte external hard drive because I'll lose it. God forbid. Yeah. Thumb drive gone.
S: Let's get back to neon lights, because I'm more fascinated by those. So do you guys know how neon lights work?
J: Sure I do.
E: Gases.
S: All right, go ahead, Jay.
J: Well, you electricity.
S: Um hm.
E: Very good.
J: And it hyper-stimulates the gas
S: (laughing) Hyper-stimulates!
J: Yes. It stimulates the gas in there, which is neon gas and the particles hit, they hit each other, right, from their moving really fast they hit each other and they produce light when they hit each other.
S: No. Good try, good try.
R: That sounded really good, though.
E: Yeah, it was pretty plausible.
S: The electrical current, which has to be at a very high voltage, it ionizes the gas. It strips an electron out of the outer shell of the neon gas.
J: That's what I said. Yup.
S: Yup. So then you have ionized gas, and with the, electrons essentially get kicked up into a higher energy state. And then, but that's unstable. So when they come back down to a lower energy state they give off a photon of energy, that's how they get rid of that energy and because the electron shells are quantal, right, it's a quantum, you have to go from one very specific state to another very specific energy state. It gives off the exact same amount of energy in each photon and that equals the frequency of light, and so neon gives off, always gives off that exact same frequency of orange-y red light. Other gases of course will give off different energies and they give off different colors. Right.
J: That's right, exactly right, Steve.
E: Argon.
S: Thank you, Jay.
B: That's kind of how a laser works, in a sense. Where you have the population version where the electrons jump to higher levels and then they spit out the electrons when they go back to their ground state. But they're all in the same frequency, though, very very specific frequency, and it's like a collimated beam, so that's what makes a laser light. Similar.
S: Right.
J: So, Steve, are you saying that the electrons rock down to Electric Avenue and then they take it higher?
S: That's exactly what happens, Jay. Now,
B: Oh. My. God.
E: You should write a song about that, Jay.
S: You can tell what gas is in
R: I gotta give that one credit, actually. That was good.
B: Wait, yeah.
R: That was really good.
B: Didn't you just like totally riff off of that?
J: I'm a fan, you know.
R: Credit where it's due.
S: So you can tell what kind of gas is in a neon tube, they're not, of course, all neon, based upon what color it is. So helium, for example, gives off an orange-y white light, neon of course is the orange-red, argon is a violet pale lavender blue, krypton (gotta love krypton) grayish, then a really pretty blue light is given off by mercury vapor. But mercury vapor also serves another purpose. Do you guys understand the difference between a neon light and a fluorescent light?
J: Aboslutely. (laughter)
S: So, this is interesting, too.
E: There's fluoride in the fluorescent light.
S: No. So a fluorescent light is essentially a neon light that has mercury vapor
J: Mercury vapor.
(laughter)
S: As the gas, and it's charged enough so that the mercury vapor gives off ultra-violet light.
R and J: Ultra-violet, yeah.
E: Ultra. Ultra-violet.
S: And then you can coat the inside of the glass
J: Insides (laughter)
S: with a fluorescent substance. The ultra-violet light from the mercury vapor hits that and
J: It hits it, yeah.
S: that fluoresces in whatever color it is. So that you can
B: That. Yeah, that, yeah.
J: That's good stuff right there, Steve.
E: Wow. So a one-terabyte thumb drive. (Everyone pretty much loses it)
J: Yup. How 'bout that, Evan. You could literally put your entire music catalog in your thumb drive and take it with you. Not that you'd need it. But you had it.
B: Wait, wait. How big is your library?
R: You could literally put an entire textbook about neon lights on a terabyte.
E: Fascinating stuff.
S: Multiple.
J: That is cool, though, Steve, and I wanna test you one year from now to see if you remember all that stuff you just read to us.
S: Okay. Do it. (laughter)
B: I can hear Steve talking to Cerie: "Cerie, remind me in three hundred and sixty-three days to look up fluorescence again and neon lights."
E: All I'm hearing is Electric Avenue in my head.
J: All right, so who's the guy that sang the song? Who remembers his name?
E: The Jamaican guy, ummm
R: Yeah.
B: Wink Martindale.
E: Eddie something. Eddie….
J: Oh, you're so close!
R: Eddie Capitan.
J: That song was written by—Eddie Grant.
S: Eddie Grant.
E: Eddie Grant.
J: I almost forgot him.
R: Never heard of 'im.
E: Grant.
B: Is that Amy Grant's brother?
S: Jay, did you know that when you ask a question and nobody has the right answer, that you're supposed to wait a very specific amount of time before you give the answer yourself? You know how long that is?
J: How long is that?
B: Three seconds.
S: Three seconds. That's right. Wait three seconds.
E: That's the courtesy window?
R: I think it depends on how funny we're being about the wrong answers. (laughter)
E: Right.
S: That's true. That's a variable that's often not included.
News Items
Predicting Murders (7:36)
Lead and Crime (14:49)
Biggest Thing in the Universe (25:27)
Million Dollar Challenge (30:11)
Turkey Bans Evolution Books (39:12)
Quicky With Bob: Apophis Update (42:31)
Who's That Noisy? (44:40)
- Answer to last week: John of God
Interview with Massimo Polidoro (47:20)
- Massimo Polidoro, director of the Italian Skeptics
Science or Fiction (1:00:13)
Item number one. A recent study finds that subject's memory for Facebook posts were significantly greater than for book entries or faces. Item number two. New research finds that some children diagnosed at a young age with autism may outgrow the diagnosis entirely. And item number three. A new study finds that graphic cigarette warnings have minimal effect, and are no more effective than text-only warnings.
Skeptical Quote of the Week (1:16:53)
No facts are to me sacred; none are profane; I simply experiment, an endless seeker with no past at my back.
Ralph Waldo Emerson
Announcements
NECSS (1:17:18)
Podcast UFO (1:18:00)
References
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