gagsrcool

Hi,

Yes you can reach the speed of light but relativity forbids you from going much more further.

gagsrcool

Hi,

bajwa, you appeared on frostcloud if I am correct.

gagsrcool

Hi,

There is nothing known as a gravitational shadow and neither can it exist.

In terms of Newtonian Physics, gravity is a force, in terms of general relativity it is a result of the matter all throught the Universe. Gravity is no entity. It is only a result of curvature of space-time and the spreading of matter all throughout the Universe.

How could a force have a shadow? In terms of relativity, how could something with no colour, shape,size anything or even frequency have a shadow? I think you have misunderstood something somewhere.

gagsrcool

Any subatomic particle to be specific cannot show particle wave-duality both at the same time.

Why did the particle-wave duality actually come up? Scientists after getting to know that most of the sub-atomic particles travel at very high speed started to conclude that it must have some wave nature as such.

Why?

Let us take some small ball weighing only about .00005 grams. If it is hurled at almost the speed of light and continues to get about in that same speed than to most of us it would act as a wave. But if we take it and its velocity into consideration at a certain point then it is observed as aminute particle.

Very much similar is the electron or any other subatomic particle for that matter. This was how the particle-wave duality got into shape and De Broglie gave his equations very soon.

I agree with bascule. But 'imaginary mass' is practically impossible. But its existence becomes impossible as nothing in the Universe can actually go much more faster than the speed of light.