Recent content by Stu165

I know that equation and all the coherence stuff, it's just the terminology of 2 parts in 10e10, has thrown me and how to get the shift from that.

forgot to look at trig identities yet. I'll try that

I need to find 1/pi int sin(theta)cos(mk theta) d theta from 0 - pi pi being the period excuse the type I don't know how to do the equation thing. I only find the cosine part of the transform cause it's and even function, therefore I don't integrate any sine...

I need to show the solution to the Fourier transfor of f(theta) = |sin(theta)|. However i think that solving this needs to be done by complex anaylsis as integration by parts just keeps going on and on. Does anyone know where to go with this?

Does anyone know what it means to say that the frequency stability of a laser is 2 parts in 10E10, I gather that it means that the frequency shifts 0.02nm each side of the mean wavelength. But I can't find any resources that use the term parts.

I just found this out, by plugging in xsubocoswt, I got F = m (wsub0^2 - w^2) x by then using undetermined coefficients I get a value of y(t) = F / m (wsub0^2 - w^2) coswt by substituting F in I get the xcos wt

I would have thought you would have to work with undetermined coefficients or something

Can anyone give me a hand with this, cause I'm stumped and can't remember exactly how to go about solving this. here's the eqn m[d^2x/dt^2 + wsubo^2 x] = F cos wt I'm supposed to show that x(t) = xsubo cos wt w is the incident freq wsubo is the resonant freq m is mass I'm stuck...

Can anyone give me a hand with this, cause I'm stumped and can't remember exactly how to go about solving this. here's the eqn m[d^2x/dt^2 + wsubo^2 x] = F cos wt I'm supposed to show that x(t) = xsubo cos wt w is the incident freq wsubo is the resonant freq m is mass...