Recent content by esradw

I need some advice for where to start my project which is about Photonics band gaps. I need to write a 10 pages paper on this subject. I am sure I will be asked a lot about the subject which won't even be in my paper so I need to learn about it as much as I can. But,unfortunatelly I don't know...

Hello, I really need help on this question, the wave travels normal to a thin plate made of N thin parallel layers of thickness d1,d2...dN and refractive indices n1,n2...nN, Ignore all the reflactions ,what is the complex ( which I thought transmittane is always real )transmittance of the...

According to Shrodinger Equation, The state function must change with time, soI wonder how do we know that after we normalize this state function, it will stay normalized ? Thanks

confused! Does every particle is a wave or every particle acts as if guided by a wave between the position measurements? I am really confused about that. Thanks

I need to find the inertia tensor for a uniform thin hollow cone,spinning about its ponted end. When the cone is solid then everything goes very smoothly by using cylindrical polar coordinates. But how should I find if it is a hollow cone. To be able to write the density of the cone I have...

I actually expect that but I am confused a little. I understand that since angular mom=0 c=0 so c=rmax(1-e) e=1 a (semimajor)=rmax/2 and c=rmin(1+e) for c to be equal to zero rmin ( semiminor must go to zero. Right ? but But I still can not find the right answer :(( (...

the answer is different than what I find thanks for your reply but when I set the equation, the 't' I find is t= r max^2/2GMs but the answer is t= (pi/2*root(2GMs))*(r max)^3/2 more like Kepler`s IIIth law. Do you have any suggestion for this one and the the b) ? ? thanks again

a) The comet released from rest at a distance rmax from the sun ( angular momentum =0 ). How long comet takes to reach the sun ? (take sun`s radius to be zero ) b) Assuming the comet can somehow pass freely through the sun describe its overal motion and find its period ? I can't really...

Or am I missing something here? I need to find delta = arctan ( 1/48) and when I calculate that arctan (1/48) I find delta=1.19 but the answer is delta =0.0208 ( it seem opposite ?) actually there was another question like that and I had the same problem there too. It seems...

thanks that was what I thought to but I wasnt sure

An underdamped oscillator`s amplitude decreases with the factor of e^-beta*T(damped) in a one cycle, but I am confused how to find the decrease of the amplitude after 10 cycles. Schould I multiply the factor by 10 like (10*e^-beta*T(damped) ) or when I am calculating the factor , should I...

I figured it out thanks again

Yes t to be t' but in the question itself says once you find the solution with t',convert it into t . I thought I can give to= dx/w then my equation become for X=Ax Cos( wt'-(wto+Deltax)) and when I unpack it, X/Ax=Cos(wt')Cos(dx+Deltax)+Sinwt' Sin(dx+Deltax) that has to stay only...

first of all mg and the drag force is in the same direction so your Fnet=-mg-uv^2 = m dv/dt and then you need to get red of m by dividing both side with. Since you need to integrate the equation . you should write it as V`s on one side on the equation and t`s on the other side so that you...

I am really lost here :( The equation of motion X(t)=Ax Cos(wt-delta(x)) Y(t)=Ay Cos(wt-delta(y)) by shifting the origine of time ( t'=t+to where I need to figure out what is appropriate for time to ) and ( Delta=Delta(y)-Delta(x) ) I am suposed...