I've read up on many websites and I've even looked on this stack exchange but I still don't understand the difference between phase difference and path difference. Can you please explain what each means and then state the difference(s). Thank you in advance
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The  is the difference between the distances travelled by two waves meeting at a point. Given the path difference, how does one calculate the phase difference?
86111
I was told that these three phases have the same meanings, but I want to know if there are any differences between them:   sort of kind of somewhat
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A  posted on Youtube.  How does this phenomenon work? I know he is using frequency to propagate water in a sine/cosine wave, but how does it exactly work this way? Why do we see it as if its paused, or in slow motion, or even in reverse?  Can someone please explain this? I am intrigued by the video and want to know it's physics.
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The  is very short and doesn't explain the concept very well, and there aren't any other sites that I can find that give a simple explanation. What does it mean by 100% modulation? I understand the basic concepts behind amplitude modulation, frequency modulation, and pulse width modulation, but I have never really understood what is meant by the "amount" of modulation or modulation depth.   Can somebody please shed some light on the subject?  Thanks!
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What is the difference between these two modules? Whoever created them didn't seem to think of including a clear description.
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How Triangle Law and Parallelogram law of addition of Vectors are different?Ain't they.  Please don't tell me the things written in book......give me the appropriate reason.And how do i distinguish between the two while adding vectors,what am i trying to say is i get really confused where to use parallelogram law and where triangle law  P.s:my basics are really weak though!May be the question might not be right
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Can paths of two adiabatic process intersect on a plot? This question is for both reversible and irreversible processes. There are some , but they mostly address only for reversible adiabatic processes. Also, I want a physical interpretation of the processes that is, if they don't intersect then why don't and what it would be like, physically for a system.
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We know that two wave sources can interfere if    two sources have the same frequency two sources must have a constant phase difference over time.   But I think that if condition 1 is satisfied, condition 2 is too. So is the second condition unnecessary? There must be some counter-example, isn't there?
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In case of interference, we know, energy is neither destroyed, nor created; but only redistributed. But in the case of an extremely thin film, due to a reflection and hence a phase difference of $\pi$, the film always appears dark due to destructive interference. So, where does the energy go?
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Suppose I have two counter-propagating travelling waves of the same frequency but of different amplitude, like the transverse waves produced in a string by partial reflection off an endpoint.  I read that we will get a mixture of standing and traveling waves, and I can see the theoretical part, but what does this mean, exactly? What are the nodes now? Also, can I now say that energy between loops will be non-transmitting? Because now we have both a traveling and a standing wave.  If possible please provide a picture for better visualization.
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I am reading about Lagrangian mechanics.  At some point the difference between the temporal derivative of a variation and variation of the temporal derivative is discussed.   The fact that the two are the same is presented in the book I am reading as a rule, commutativity, and possible non-commutative rules are mentioned too.  I do not get it: given a path $q(t)$ and its variation $\delta q(t)$, the equivalence between the variation of the derivative $\delta \dot{q}$ and derivative of the variation $\dot{\delta q}$ seems to me a fact descending straight from calculus, not an arbitrary choice.  References:   B.D. Vujanovic and T.M. Atanackovic,, (2004); p.12. C. Lanczos, The Variational principles of Mechanics.
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A user of ours cleared their path, thanks to some directions on the internet.  What is the default path, I am a developer so I have tons of extra stuff in mine, what should my user get on a plain jane one?
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Echoing path in ubuntu returns following colon separated paths,  /home/stack/bin:/home/stack/.local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin   In these paths at some places there is local while at others .local is used what is the difference between both?
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Greatings!  I'm trying to understand special relativity and have one question bugging me.  In almost every book or video about the subject there is a thought experiment with moving light clock. I hope I need not elaborate on the sutup and the outcome of the experiment.  So the question is this: When a light source on the MOVING light clock emits a photon of light the path of the photon is triangular.   How this can be?   I thought since light speed is constant in every reference frame the movment of the "emmiter" can't affect the movment of the light so light should shoot right up (from the point of stationary observer) and thus move backward and up from the point of moving observer.  So you see my logic is: light speed is invariant => you can't make it move UP &amp; FORWARD only UP. i.e. you can't change it's direction once it's emited in UP direction. Why the hell light moves sideways then?  And I'm puzzeled. There is flaw in the logic but I don't see it.  Thanks for help.
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I recently read about different phases of ice on Wikipedia. But I can't find any pictures of the different ice phases. Do they all look alike visually? If you weren't able to measure the pressure and temperature, would you be able to tell one phase from another in any way?
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What is the difference between  and ? I mean diffraction is just bending of light waves or waves in general around a point. So how can there be two types of diffractions?  If Diffraction means something else in this context, then please explain the difference between these two types of diffraction.
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Can anyone please provide an intuitive explanation of why phase shift of 180 degrees occurs in the Electric Field of a EM wave, when reflected from an optically denser medium?  I tried searching for it but everywhere the result is just used.The reason behind it is never specified.