13,416 reputation
43179
bio website manishearth.github.io
location Mumbai, India
age 21
visits member for 3 years, 7 months
seen 16 hours ago

I am an engineering student who loves the sciences, especially physics.

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Nov
23
comment Do photons age in a medium?
@Tarek Basically, group velocity and phase velocity. The phase velocity of the photons is $c$, the group velocity of the resultant wavepackets is not.
Nov
21
comment Do photons age in a medium?
@Rob It's probably not the same photon. A single photon can lose energy while moving through a medium, but of course that energy is not "lost", it is absorbed by the medium and possibly emitted in the form of another photon
Nov
21
comment Field of a parallel plate capacitor
@rijulgupta $\mathbf E=\left(-\frac{\frac{y-1}{\sqrt{x^2+(y-1)^2}}-\frac{y}{\sqrt{x^2+y^2}}}{x}-\frac‌​{\frac{y-1}{\sqrt{(x-2)^2+(y-1)^2}}-\frac{y}{\sqrt{(x-2)^2+y^2}}}{2-x},\left(\fra‌​c{1}{\sqrt{x^2+(y-1)^2}}-\frac{1}{\sqrt{x^2+y^2}}\right)-\left(\frac{1}{\sqrt{(x-‌​2)^2+(y-1)^2}}-\frac{1}{\sqrt{(x-2)^2+y^2}}\right)\right)$. It's a pretty easy integration. Usually you can find the formulae in concise form in terms of the angles subtended by the particle on the rod, and then if you really need it in cartesian form it can be easily substituted.
Nov
21
comment Field of a parallel plate capacitor
@rijulgupta I just plugged in the formulae into Mathematica and used StreamPlot and VectorPlot
Nov
21
comment Field of a parallel plate capacitor
Don't delete questions on a whim unless they're off topic. This isn't too bad a question, really.
Nov
21
comment Advanced data analysis in Physics experiments
@jinawee Oh, it's not off topic, from what I see. I'm just saying that it would be better if the primary emphasis of the question was books.
Nov
21
comment Advanced data analysis in Physics experiments
To clarify, book questions are allowed by the policy, but list questions .. not so much. I suggest you rearrange your question to make the primary point about books
Nov
20
comment how long do large hadron collider experiments take?
Ah, makes sense. I know it really is you, I recall it from Facebook. :)
Nov
20
comment how long do large hadron collider experiments take?
What madness is this? There seems to be a noticeable lack of pink on your profile :P
Nov
20
comment Using gravity to send messages (at the speed of light)
@Gibybo And that's at what distance of separation? If you want to use it for communication, you need to have some appreciable distance between them.
Nov
20
comment Using gravity to send messages (at the speed of light)
@Gibybo Now calculate the change in the force. The absolute value of the force is not important, the change in force is.
Nov
19
comment Why don't metals bond when touched together?
@ChrisWhite Appreciable=enough to stop welding. Gold doesn't form a whole layer of oxides, but it will form a monolayer of oxygen and other stuff. Which I'm calling "oxide layer" (probably shouldn't, will edit)
Nov
19
comment Why does a helium filled ballon move forward in a car when the car is accelerating?
Please do not have long comment discussions on the main site. Feel free to continue this by creating a room in Physics Chat.
Nov
19
comment Why does a helium filled ballon move forward in a car when the car is accelerating?
Pranav, please be nice.
Nov
17
comment If time travel to the past is not possible why is this situation considered in Feynman diagrams?
@DavidH IIRC The idea that all electrons are the same electron has been ruled out, however the idea that a positron can be viewed as a backward-in-time electron is still around. I think, but not used much.
Nov
15
comment Please recommend a good book about physics for young child (elementary school aged)
Just a note: This is being closed for now, but since we have a new policy about recommendation qs that was recently released, we need to discuss how to handle the old questions.
Nov
12
comment Cooling a cup of coffee with help of a spoon
Note: You've been mentioned in the latest what-if xkcd.
Nov
8
comment How did neodymium magnets get their name?
@Eiver "rare earth metals" refers to the lanthanides and actinides. Boron is not a rare earth. Nd is the one with special properties.
Nov
7
comment Understanding the Wave Function and Excited States
@Programmer Mattia is correct here, if you solve the equation you may get all possible eigenstates, but a given solution is a single state. Superpositions are states too, even if not eigenstates.
Nov
6
comment Infinite Mirror Face to Face With Infinite Two Way Mirror
@Dimension You know very well that the popsci tag only applies to questions where the asker explicitly mentions that he wants laymanized answers. Please do not misuse it, otherwise the tag will be removed without further ado as mentioned in the past