No, he's right. Light travels at its max speed in a vacuum but is slowed down in anything else. He did make one slip of the tongue though: he said that glass only refracts but doesn't reflect - that's wrong. It also reflects (we can see our reflections in a window, right?). I just did this experiment today for the first time - it's very cool to see firsthand!
@@yobabyyo www.askamathematician.com/2011/08/q-if-light-slows-down-in-different-materials-then-how-can-it-be-a-universal-speed/ There you go. Read up on that, before you make another ludicrous statement.
Aren't you being a bit of a smart aleck though! If what the article you refer to is true (and it certainly makes sense - I didn't know about this), it's still not "ludicrous" to claim that it slows down in other materials. Even the article itself says that it's pretty close to correct to make that claim. The devil is in the details - and yes, it's interesting, but it doesn't mean you have to flat-out state that the claim is false, especially when it's not 100% clear what one means when one says "slows down" - after all, light DOES take longer to pass through it, and that's already a pretty solid basis for claiming that it's "slower". It would be more accurate to say that it's *average speed* is slower, just like a car travelling at 65 mph for some time, except when making rest stops. That said, your first statement is wrong anyway, because light doesn't travel a "longer path" - it simply gets stopped (and re-emitted) by the atoms along the way, which is what the article you linked to says. Anyway, it's an interesting side note that light doesn't really slow down but simply "takes longer" because of the "stops" along the way, but there's no need to get snarky about it...
@@yobabyyo well constructed reply. But if you have ever researched atomic photon emission, you would know that photons almost never get reemitted in parallel to its entry direction. They almost always get emitted at a slight angle. Therefore I would not be wrong be wrong in saying light travles a longer path, but I get that I could have been slightly more accurate in my response.
OK, we can close this thread : ) having learned something! (and no, I never studied photon emission, just regular physics!). When you get down to the nitty gritty, semantics do tend to get in the way of clear communication...
This comment is 1 year old but really? This experiment works best with Pyrex and Wesson because they both nearly have the same index of refraction. It's not an advertisement, and if it was then that's a weird way to use vegetable oil and pyrex glass.
It's not intended to be - as explained above this works best with Pyrex glass and particular types of oil. We've tried different combinations and find Pyrex+sunflower oil works best.
Dang he looks a lot like Shia Labeouf
h
sino to?
cool😎😎😎
The guy is wrong. Light travles at the same speed all the time. But trough differente substances it just travels a longer path...
No, he's right. Light travels at its max speed in a vacuum but is slowed down in anything else. He did make one slip of the tongue though: he said that glass only refracts but doesn't reflect - that's wrong. It also reflects (we can see our reflections in a window, right?). I just did this experiment today for the first time - it's very cool to see firsthand!
@@yobabyyo www.askamathematician.com/2011/08/q-if-light-slows-down-in-different-materials-then-how-can-it-be-a-universal-speed/
There you go. Read up on that, before you make another ludicrous statement.
Aren't you being a bit of a smart aleck though! If what the article you refer to is true (and it certainly makes sense - I didn't know about this), it's still not "ludicrous" to claim that it slows down in other materials. Even the article itself says that it's pretty close to correct to make that claim. The devil is in the details - and yes, it's interesting, but it doesn't mean you have to flat-out state that the claim is false, especially when it's not 100% clear what one means when one says "slows down" - after all, light DOES take longer to pass through it, and that's already a pretty solid basis for claiming that it's "slower". It would be more accurate to say that it's *average speed* is slower, just like a car travelling at 65 mph for some time, except when making rest stops.
That said, your first statement is wrong anyway, because light doesn't travel a "longer path" - it simply gets stopped (and re-emitted) by the atoms along the way, which is what the article you linked to says.
Anyway, it's an interesting side note that light doesn't really slow down but simply "takes longer" because of the "stops" along the way, but there's no need to get snarky about it...
@@yobabyyo well constructed reply. But if you have ever researched atomic photon emission, you would know that photons almost never get reemitted in parallel to its entry direction. They almost always get emitted at a slight angle. Therefore I would not be wrong be wrong in saying light travles a longer path, but I get that I could have been slightly more accurate in my response.
OK, we can close this thread : ) having learned something! (and no, I never studied photon emission, just regular physics!). When you get down to the nitty gritty, semantics do tend to get in the way of clear communication...
feels like a pyrex and wesson advertisement. thumbs downed
This comment is 1 year old but really? This experiment works best with Pyrex and Wesson because they both nearly have the same index of refraction. It's not an advertisement, and if it was then that's a weird way to use vegetable oil and pyrex glass.
It's not intended to be - as explained above this works best with Pyrex glass and particular types of oil. We've tried different combinations and find Pyrex+sunflower oil works best.