Recent content by jonathanpun

Then I think that FAA will only quote the maximum force in 397. Why they quote the minimum force in 397? It's meaningless?

Hi, Can anyone here can explain to me the difference between FAR23.397 and 23.143? What's the maximum and minimum force represents in 23.397?

I am facing some problem about derivatives in spherical coordinates in spherical coordinates: x=r sinθ cos\phi y=r sinθ sin\phi z=r cosθ and r=\sqrt{x^{2}+y^{2}+z^{2}} θ=tan^{-1}\frac{\sqrt{x^{2}+y{2}}}{z} \phi=tan^{-1}\frac{y}{x} \frac{\partial x}{\partial r}=sinθ cos\phi then \frac{\partial...

I have read the derivation of the Rayleigh-Jeans law from: http://www.cv.nrao.edu/course/astr534/BlackBodyRad.html This derivation is quite similar to the derivation in my textbook. My question is why the frequency/wavelength is quantized, but there still a d\nu or d\lambda. Not this "d"...

Both Compton effect and photoelectric effect involves collision of photon with a electron. I don't understand why one has scattering but one is simply kicking out electron. The photoelectric effect said light can transfer it's energy only in quantized units of h bar, so why the photon in...

When I was doing my assignment, I need to proof the Wien's Law. The question given frequency dependent energy density function. So differentiate it respect to frequency v. Equate it with zero, and solve. i solved the value a=2.82144 = hv/KT=hc/(lambda)KT, i cannot get a correct value for the...