Physics Forum Nepal

27/12/2019

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09/08/2015

like to make ur brain sweat!😁
watch this
https://youtu.be/Chfoo9NBEow

Astrophysicist, cosmologist and Nobel Prize winner George Smoot studies the cosmic microwave background radiation — the afterglow of the Big Bang. His pionee...

01/05/2015

http://www.huffingtonpost.com/2015/04/27/nepal-earthquake-science_n_7149692.html

A devastating 7.8-magnitude earthquake in Nepal on Saturday was part of a pattern of major temblors that have become so predictable that many seismologists had been expecting this one -- and at least one team of researchers warned just weeks ago that...

04/10/2014

:-P

11/12/2013

Events in the future can affect what happened in the past

The weirdness of the quantum world is well documented. The double slit experiment, showing that light behaves as both a wave and a particle, is odd enough – particularly when it is shown that observing it makes it one or the other.
But it gets stranger. According to an experiment proposed by the physicist John Wheeler in 1978 and carried out by researchers in 2007, observing a particle now can change what happened to another one – in the past.
According to the double slit experiment, if you observe which of two slits light passes through, you force it to behave like a particle. If you don’t, and observe where it lands on a screen behind the slits, it behaves like a wave.
But if you wait for it to pass through the slit, and then observe which way it came through, it will retroactively force it to have passed through one or the other. In other words, causality is working backwards: the present is affecting the past.
Of course in the lab this only has an effect over indescribably tiny fractions of a second. But Wheeler suggested that light from distant stars that has bent around a gravitational well in between could be observed in the same way: which could mean that observing something now and changing what happened thousands, or even millions, of years in the past.

09/08/2013

How can you be certain about anything that has an "Uncertainty Principal" at its core?
When will transporters be invented?

The Uncertainty Principle, which says that more than one aspect of a particle cannot be measured simultaneously, illustrates one of several major differences between quantum physics and classical physics. This idea, first presented by Heisenberg, takes into account that a miniscule bit of material can be either a particle or a wave, depending on the circumstance. Actually, it is neither, until someone looks at it or an experiment forces it to pick sides. This means that a number of qualities aren't defined. If a scientist measures the speed of a particle, for instance, he can't measure position very accurately; it's as though quantifying one aspect puts the other aspects more out of focus. Physicists know this and try to compensate for it in their experiments. Still, the word "uncertainty" is there for a reason. Some physicists say this is not a principle at all and instead prefer to call the concept "uncertainty relations"


Quantum physics fans were thrilled when, in an episode of "Star Trek: The Next Generation," a character referred to the Heisenberg Compensator as a way of explaining how the famed transporters worked . Heisenberg Uncertainty Principle is one reason why transporters are far, far (if ever) in our future, since it states that you can't know position and momentum simultaneously. And that would be a problem if you're being beamed molecule by molecule from the Enterprise and reassembled on the surface of a strange planet.

checkout this you tube comedy video about transporter effect...
http://www.youtube.com/watch?v=nj5Gq3wIDpo

21/06/2013

“In every branch of knowledge the progress is proportional to the amount of facts on which to build, and therefore to the facility of obtaining data.”