Recent content by lockerman2007

Consider a soap film where both sides of the film is air. So reflected light has a π phase change. Consider constructive interference, 2 d "nfilm" + 1/2λ = nλ , where "nfilm" is the refractive index of the film and d is the thickness the film. Due to the gravity, the film at the bottom...

I have a question about orbital speed. Imagine a shuttle moving in an orbit near the Earth surface, its total energy is "-GMm/2r", so its total energy is directly proportional to -1/r In order to spiral into another orbit of smaller radius which mean it would have a larger angular speed...

Thank you for the explanation and correction! >>I don't know what violet has to do with anything. If scattering is more effective for shorter wavelength, violet is scattered more than blue and the sky should be violet. As for "scattering more effective", is greater proportion is scattered...

I have done a little research on the internet and I would like to ask my concept is correct or not. 1) Sky is blue As the effect of rayleigh scattering is more effective for shorter wavelength, blue light scatter more than others (e.g. red). Furthermore, our eyes are more sensitive to blue...

That means the movement of electrons produce a magnetic field ? Can we consider that for a emf to be induced, electrons should move to one side of the rod and at this small instant, a magnetic field is produced ?

I want to ask a question about magnetic field. If I move a metal rod in a magnetic field, an emf is induced in it, will the emf produce a magnetic field ? Actually, a magnetic field is produced by an electric field or a current ??

I don't quite understand what is the meaning by "see" a higher refractive index, can you explain it in detail ? thank you.

hmm, so as different color of light have different speeds, why they do not separate when they travel to the Earth as they already traveled a long long distance from the sun to the Earth ??

Hi, I have a question about the dispersion of white light in prism. Why different color of light have different speed in prism ? What properties of light affect its speed ?