Physics Help Forum wavicle: an old topic

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 Jun 22nd 2019, 02:45 AM #21 Senior Member     Join Date: Jun 2016 Location: England Posts: 932 @Neila Where does your initial equation for the speed of the probability wave come from? __________________ ~\o/~
 Jun 22nd 2019, 03:15 AM #22 Senior Member   Join Date: Mar 2019 Location: cosmos Posts: 398 @Woody: It's from Duck de Brogile, the ancestor of probability (matter) wave... topsquark likes this.
 Jun 22nd 2019, 01:47 PM #23 Forum Admin     Join Date: Apr 2008 Location: On the dance floor, baby! Posts: 2,730 Just a stray thought that might have some bearing on what you are asking. Waves have two speeds: group and phase speed. The group speed is $\displaystyle v_g = \dfrac{d \omega }{dk}$ and is what you would say is the speed of the wave. The phase speed is $\displaystyle v_p = \dfrac{ \omega }{k}$ and can be faster or slower than the group speed. A light wave has $\displaystyle v_g = c$, whereas the phase speed can actually be faster than this. -Dan __________________ Do not meddle in the affairs of dragons for you are crunchy and taste good with ketchup. See the forum rules here.
 Jun 22nd 2019, 03:51 PM #24 Senior Member   Join Date: Mar 2019 Location: cosmos Posts: 398 simple vs complicated @dragon: Why must you talk about group speed? Can you use simplified method to explore physical principle and highlight the emphasis? Attached Thumbnails
Jun 23rd 2019, 02:10 PM   #25
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 Originally Posted by neila9876 @Woody: It's from Duck de Brogile, the ancestor of probability (matter) wave...
By the way, it is "Duc" (French for "Duke) de Broglie

Jun 23rd 2019, 05:50 PM   #26

Join Date: Apr 2008
Location: On the dance floor, baby!
Posts: 2,730
 Originally Posted by neila9876 @dragon: Why must you talk about group speed? Can you use simplified method to explore physical principle and highlight the emphasis?
I mentioned it because, honestly, I still don't know what you are asking in that last post! I was taking a guess that what I said might be relevent.

-Dan
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 Jun 24th 2019, 06:17 AM #27 Senior Member   Join Date: Mar 2019 Location: cosmos Posts: 398 relevant @no one: I would rather talk about the ancient Chinese fiction Travelling to the West again... Monk Pig (猪八戒) always considered that the beautys were relevant to himself... The master as well as the captain Monk Tang (唐僧) simplified the world and considered that only the Buddism was relevant to himself...and he got the "trueth". Attached Thumbnails

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