Recent content by Shailesh Pincha

I don't know, to what extent you have knowledge in Classical Mechanics. So I would like to suggest "Goldstein" for Classical Mechanics. Solve each and every problem you can. take help of others if you can't solve the problems on your own. The knowledge of Classical Mechanics comes in handy to...

That is precisely my question. We hypothesise the existence of dark matter or some new gravitational theory based on the deviation of rotation curve from what we expect from Kepler's III Law. But how do we formulate the Kepler's law to be applicable in that condition?

There are 2 unknowns in the formula. The time period of rotation and the mass enclosed by orbit is Star. So how could we calculate the expected time period of rotation of stars in a galaxy and thus velocity of stars.

Why can't we have an Electromagnetic wave in which the Electric Field and Magentic Field aren't in phase?

It's speculated that there exists Supermassive Black Holes at the centre of the galaxies. So wouldn't the mass density obtained by the value, 1600stars/light year, be too great compared to the calculated and assumed density of the SMBHs.

What is the density of galactic centre? Thus what form of Kepler's law account for the galaxy rotation curve increasing near the galactic centre?

http://www.quora.com/Why-is-the-spectrum-of-Bremsstrahlung-radiation-continuous In the above link, it says that "you will count more low-energy events since they are more probable." Which must mean that at lower energy we must get more intense radiation...

Is it experimentally proven or something like that which proves that black hole absorbs everything or it is just theorised?

Black hole is considered an almost ideal black body by being a perfect black hole. But does it ideally absorb everything coming in the vicinity of its impact? Is it really possible for anybody to either ideally absorb or ideally radiate energy?

I was just thinking about the ways tried to understand electron and maybe made a mistake their. Thus I wanted to know the possible mistakes in observing electron. But you made me a lot of things clear. Thanks

Ya that's, precisely, my question and I want to know the possible methods to measure position and momentum.

What are some of the failed experiments to determine electron's position? One could be by electromagnetic radiation of suitable wavelength (here X rays) but that tears apart the atom. I want to know the different views tried to determine electron position.

When you are in a space lab, it itself is a stationary frame and thus you can't perform an experiment which could prove that your time is running slow. It's always the observed quantities which change and not observer's. For the second query may this help.

That's where you had a mistake. Black Hole can't be huge. For an immense density which could also attract light by its gravitational force, you need a radius as small as possible and that's why the largest one has found to be of I guess diameter 64 km. If its huge then you can't be alive, coping...

But laser requires that all the photons emitted are monochromatic, coherent and in phase. But all know is that photon interacted and photon emitted are the only two which possesses these property. So the monochromaticity, coherency, and in phase characteristics should be in pairs rather than...