[sci.physics.research and the fucking frauds, the moderators to
begin with: my posts get only posted when it's too late or with
Tom Roberts bullshit and infamy spread on top, you bunch of
blood-sucking nazi-retarded frauds for generations...]

On Wednesday, 2 August 2023 at 19:11:10 UTC+2, Stefan Ram wrote:
> In the third lecture of the series "New Revolutions in
> Particle Physics: Basic Concepts" (Fall, 2009) from "The
> Theoretical Minimum", Professor Susskind talks about what
> a quantum field is and how it is related to particles.
>
> He considers a circle with a coordinate "x" and an amplitude
> "exp( i k x )", and says that the momentum "p" is "hbar k".
>
> Then he says (about 8 or 9 minutes into the video):
>
> |"k" is called the "wave number". Uh. It's a wave number.
> |And it can be positive or negative? Waves moving to the left,
> |moving to the right, corresponding to momenta, going to the
> |left or the right.
>
> How can he talk about "waves moving to the left" if his
> amplitude "exp( i k x )" does not depend on the time
> (contains no "t")?
>
> Do you think that "exp( i k x )" without "t" in his model
> means that the amplitudes are constant (not depending on
> the time) or is "exp( i k x )" a snapshot of the situation
> taken at one instant (but actually depending on the time)?

By what he says in lecture 2, I understand he is using 'x' as a
"formal parameter", i.e. the treatment at that point is abstract,
and "to the left/to the right" is an informal/suggestive way to
say how the exponential varies with the parameter:
<https://youtu.be/oT7bTr5YEO4?t=435>

Julio

On Sunday, August 6, 2023 at 12:00:13 AM UTC-7, Julio Di Egidio wrote:
> [sci.physics.research and the fucking frauds, the moderators to
> begin with: my posts get only posted when it's too late or with
> Tom Roberts bullshit and infamy spread on top, you bunch of
> blood-sucking nazi-retarded frauds for generations...]
>
> On Wednesday, 2 August 2023 at 19:11:10 UTC+2, Stefan Ram wrote:
> > In the third lecture of the series "New Revolutions in
> > Particle Physics: Basic Concepts" (Fall, 2009) from "The
> > Theoretical Minimum", Professor Susskind talks about what
> > a quantum field is and how it is related to particles.
> >
> > He considers a circle with a coordinate "x" and an amplitude
> > "exp( i k x )", and says that the momentum "p" is "hbar k".
> >
> > Then he says (about 8 or 9 minutes into the video):
> >
> > |"k" is called the "wave number". Uh. It's a wave number.
> > |And it can be positive or negative? Waves moving to the left,
> > |moving to the right, corresponding to momenta, going to the
> > |left or the right.
> >
> > How can he talk about "waves moving to the left" if his
> > amplitude "exp( i k x )" does not depend on the time
> > (contains no "t")?
> >
> > Do you think that "exp( i k x )" without "t" in his model
> > means that the amplitudes are constant (not depending on
> > the time) or is "exp( i k x )" a snapshot of the situation
> > taken at one instant (but actually depending on the time)?
>
> By what he says in lecture 2, I understand he is using 'x' as a
> "formal parameter", i.e. the treatment at that point is abstract,
> and "to the left/to the right" is an informal/suggestive way to
> say how the exponential varies with the parameter:
> <https://youtu.be/oT7bTr5YEO4?t=435>
>
> Julio

How does wind create waves at the edge of the ocean?
How does it lift the water up and make it a wave?