Recent content by ggolu2

How one can say that the space is expanding by just verifying that the galaxies are speeding away from each other?

Oh I got it... Now what I got is that small bodies do not get stretched with space but the space in which they are located gets stretched.

Gravity, Electromagnetic Forces, Strong and weak force acts among the particles and I think that space is not affected by them. These forces do not stretch or contracts space except gravity which only curves it. So I think that expansion of universe has nothing to do with these forces.

Can string theory explain dark matter and dark energy?

Space is expanding and there is no difference between intergalactic space and space in which we are present right. So why would you not agree on the fact that we are also 'expanding'?

Universe is expanding. I know that all the galaxies are getting away from each other due to the expansion. So in theory is it true that we along with every other system of particles are getting stretched with the space ( or the distance between our constituent particle is getting bigger and...

No this is about theory of special relativity. It uses transformation law to derive the equations of Lorentz transformation. And my question is about the use of the constant, I mean how they thought that there must be a constant such that this equation holds good at high speeds.

I really don't understand what it is and what is the use of constant, like in this equation of transformation. x=k(x' + vt). The equation can also be good if it is just like this, x=x' + vt Thank you.

Alright. Thanks everybody for replying to this topic and sharing your perspective and valuable info. I'll go deep in everybody's reply.

So why can't an electron curve space?

Our latest understanding of gravity is based on Einstein's general theory of relativity which says gravity is geometry not a force and matter curves the space around it. So why it is hard to find or believe that elementary particles can also do so. If they can't do so, why can't it be just that...

Divide denominator and numerator by cos^2(x). Then substitute tan^2(x) in the denominator as T (or any other variable you want). Then proceed with the procedure for solving integration by substitution. If you have problem in solving this question, let me know.