Recent content by manulal

As per special theory of relativity, no inertial reference frame is special! If a spaceship is moving at 100 m/s, no one can conduct an experiment to determine whether it is moving at 100 m/s or the rest of the universe is moving to the opposite direction at -100 m/s, if I understand the...

Thank you very much to all for your replies. I think I have made a mistake of not phrasing my question correctly and not stating what exactly the question is for which I seek the answer. I am a mechanical engineer and I am trying to grasp the basics of electrical engineering on my own at...

Hello friends, I am finding it a bit difficult to comprehend what the author of a famous textbook has written about TV signal band width. Here is the excerpt from his book. Could any of you please explain what exactly he means? I don’t get why the required bandwidth is around 5.5 MHz...

You are right. Such experiences are so exciting beyond description.

Today, I was listening to the third chapter of the audio book “The Hidden Reality Parallel Universes and the Deep Laws of the Cosmos” by Brian Greene in my car. I was amazed when I heard the author asking the audience this same question. He gave a detailed answer too. This latest work by Mr...

Thank you Bill. Wasn't that difficult to grasp.

@bcrowell Thank you very much for the quick reply. If you don't mind, could you please explain a bit more or suggest a reference? Manulal.

Thank you all for the valuable replies.

I have seen in many books explaining big bang the following kind of expressions.. “In the first few seconds of big bang…” “In the first few millionth of seconds of big bang..” Since time is not absolute, what exactly is meant by these “seconds”? Are these seconds same as “our second”...

Thank you Adam for the excellent animations.

Dear Friends, I am presently studying physics on my own. (Not for a degree but just out of curiosity) My question is, both gravity and charge being fundamental forces, is science more comfortable in explaining one of them compared to other? I see some threads here wondering what exactly...

Dear Friends, You will not believe how relieved I was when I saw this thread yesterday. I know very well how teachers explain GR. All those bookish explanations including stretched rubber sheet and all. Tensor calculus is also not that difficult to me. But still, like Per, I want to know what...

Both are theories and i think big bang is more believable as it tells that the universe originated billions and billions of years ago. As per Bible it happened a few thousands of years ago which definitely not true.

Absolutely not. Out of the 45 engineers passed out with me from the university in 2000, no one other than a friend of mine and myself (as we were serving in merchant navy) can even explain the working of many parts in an automobile. But this does not mean that they were not good at studies or...