Homework Statement
Consider the following scalar theory formulated in two-dimensional Euclidean space-time;
S=∫d2x ½(∂μφ∂μφ + m2φ2) ,
a) Determine the equations of motion for the field φ.
b) Compute the propagator;
G(x,y) = ∫d2k/(2π)2 eik(x-y)G(k).
Homework Equations
Euler-Lagrange equations...
Ok, thanks a lot guys for the good responses and links, it's made things a little more clear and got me a lot more interested in the subject :smile:.
Also one last question, would any of you happen to know of a book that gives a good introduction to special relativity?
Thanks for all the replies, they are very helpful. So is it correct to say:
The spatial coordinate tells you the distance an event has taken place relative to your origin in your reference frame using the three dimensions (x,y,z).
The time coordinate tells you the time the event took place...
Hello PF,
I have just been given an introduction to special relativity and its postulates. One of the consequences of special relativity of course is that space and time are entangled and that in order to assign a coordinate to an event, you must give it spatial (x, y ,z) and temporal...
Ahh ok, I understand now, thanks a lot cepheid for making that clear. Taking that into consideration, the answer that I am coming to now seems to make a lot more sense. :smile:
Homework Statement
Given the following data, calculate the main sequence lifetime of the Sun (in years), assuming that all the initial mass is hydrogen and all of it is converted into helium.
Mass of the Sun = M = 2x1030kg
Luminosity of the Sun = L = 4x1032W
Energy released in the...
Hello guys,
Ok, so today in school my physics teacher was talking to us about waves and how they are formed etc. He told us that a transverse wave is formed by oscillating an electron and the 'electron oscillates perpendicular to the direction of movement'.
So, here's the problem I can't get...