Sun 16 Sep 2007
Myth 2: Polar bear fur is fiber optic (NOT!)
Posted by sciencegeekgirl under Bad Science , Science Education , Science Myths
There’s this myth floating around that polar bear fur is fiber optic. It’s not. It’s not it’s not it’s not.
The myth goes like this… polar bears are white, but they have to keep warm in the winter. But white reflects light and heat, so how do they do it? By having fiber optic fur. “Fiber optics” are a type of “light pipe” that channels light extraordinarily well, sort of like an electric wire does for electric current. So, this is supposed to heat them up by channeling light to their black skin.
This is based on research that showed that polar bears are white to you and me, but don’t emit any ultraviolet (UV) light (they’re black in the ultraviolet). They thought the UV radiation was being absorbed by fiber optics and transported to the skin. It turns out instead that polar bear fur just absorbs UV on its own because of what it’s made of. So this is an example of an early, incorrect science report getting circulated and taking hold in the popular mind.
This myth gets perpetuated by the fact that polar bear fur is hollow. Fiber optics are also hollow, but not every hollow thing is a fiber optic (this is like the “a square is a rectangle but a rectangle isn’t always a square” thing).
Paul D. has an SEM picture of polar bear fur on his website (and some more information).
I was interviewing a scientist/economist (who does a lot of popularization of science) once and he mentioned that “polar bear is fiber optic” as he was discussing solar energy. I told him that, indeed, I had only recently found out that that is a myth, and asked him to retake his answer without that reference (since this was for radio). He did, but I thought his manner was odd. I saw him speak — for a LIVE TELEVISION BROADCAST — on solar energy a few weeks later. And while I sat there flabbergasted in my seat, he repeated the “polar bear is fiber optic” myth right there in front of the cameras!
Do a Google right now for “polar bear fur fiber optic” and you’ll find a variety of links, many of which shed doubt (and some which don’t) on this myth. I wonder if he researched the topic and found something compelling to convince him it was true, or whether the story was just too good to drop? So, this is how myths are perpetuated.
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8 Responses to “Myth 2: Polar bear fur is fiber optic (NOT!)”
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Posted: Jan 18th, 2008 at 10:31 am1Is polar bear fur transparent? « SciencegeekgirlReply to this comment.[...] Note that polar bear hair is NOT a fiber optic. You can see my earlier posting about that. [...]
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Posted: Jun 7th, 2008 at 8:41 am2Myth 7: Blood is blue « SciencegeekgirlReply to this comment.[...] because with any thought, you often realize that these don’t make sense (like the idea that polar bear fur is fiber optic, which just doesn’t stand up to scrutiny). There is a delightful episode of This American [...]
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comansenseisunderrated
Posted: Jul 2nd, 2008 at 7:56 am3Reply to this comment.Glad to hear some commonsense on the whole poalr bear hair thing. I’m originally from Churchill, Man. It’s also stated in many, many, many papers and on the net that polar bear skin is black, so it can soak up heat from the sun. Think, people!! Were do polar bears live? It’s dark all winter long! How do they soak up anything from the sun when it doesn’t exist for aprox. half the year?
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DX-48
Posted: Jul 16th, 2008 at 5:01 pm4Reply to this comment.i have to agree, the black skin isnt even visible so it cant be used to catch sunlight. No, i think the polar bear fur, being hollow, keeps a layer of insulated air between the bear and its frigid environment. seems like a more believable answer then black showing through white, or fiberoptic fur(fiberoptic wires are a synthetic, aren’t they?)if it were that easy, we could just shear the hear and spin it for the wires, like sheep.
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Posted: Sep 1st, 2008 at 2:27 pm5Arctic sea ice *is* melting fast « SciencegeekgirlReply to this comment.[...] way around the internet. So, just like myths like polar bear fur being a fiber optic (it’s not), or cats which grow wings (they don’t) it may be hard to get this one to go away. Why is [...]
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Posted: Feb 22nd, 2009 at 11:24 pm6Pravda o ledním m?dv?dovi | Seby.czReply to this comment.[...] Myth 2: Polar bear fur is fiber optic (NOT!) [...]
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Alfred
Posted: Apr 2nd, 2009 at 9:22 am7Reply to this comment.“Fiber optics are also hollow, but not every hollow thing is a fiber optic”
Optical fiber is NOT hollow. Anyone who has terminated one can attest to that. They are solid glass with a reflective cladding. Let’s not let any other rumors start here.
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Fiber Optic
Posted: Jun 27th, 2009 at 1:55 am8Reply to this comment.Well, a Fiber Optic is a solid structure commonly made out of glass ( other materials like plastic are also used to make specialty fibers). However, commonly used optical fiber used in telecommunication is made out of glass. A fiber optic has 3 main structural sections core, cladding and jacket. Jacket is a protective cover over core and cladding and has no role in transferring light from one end to other. The light is solely transmitted by core and cladding glass structure. Hope it helps.