Recent content by Varsha Verma

Imagine a car which has a speaker attached to the back. Speaker is blasting very high volume music towards the reverse direction of the car. Now the car starts accelerating and in a few seconds starts moving faster than the speed of sound. Will a listener be able to hear the sound now. Will...

So, what is the experiment we can do if we assume we have this enormous energy??

I was watching a video where well known physicist Lisa Randall said that we still don't know whether space is continuous or discrete. My question is, how do we find whether space is continuous or discrete?? What type of experiments are possible? Is it being done now?? I am thinking this may be...

I am not trying to debate. I am trying understand this stuff. I am bit shocked that somebody like Alan Guth did not correct the diagram.

Please see this video of Alan Guth the 'father' of inflation: I swear I hear Alan Guth say at the beginning that "inflation is a PREQUEL.. ", meaning that it happened 'before'. But look at the diagram he shows after that. It clearly indicates that that inflation is happening AFTER the big...

Inflation happened BEFORE the big bang? I am completely flummoxed. :nb):woot:

In order to complete the picture I need to know this. So, at t=0 of the Big Bang, not T=0, that is the start of the universe, we have (1.) Infinite space - We don't know how this space came to be. Maybe it was 'created' or was there all along. (2.) Very dense hot point the size of a atom...

Can you confirm this please. Because this will make my understanding of this big bang subject much clear. That is, 'space' was 'infinite' at the Big Bang also? This is what was confusing me all along. If you scientists say that 'space' was also infinite at the big bang, then even lay people...

So this is the 'multiverse' you are describing right?? Also, why he "if"? Because isn't the current model of the universe spatially infinite?? So, why use 'if'?? Does not this mean space was infinite at the big bang also?? If space was infinite at the big bang then even I can understand the...

Is it possible to create a 3-D model of the universe at the big bang? Or is it not possible because of this 'spacetime' thing... Spacetime is space with a time value to it, right?? Or is it something completely different thing?

Let me ask you this since you seem to know this stuff. So you saying that if we take a spaceship which can travel at trillion times the speed of light (lets assume ok), the more you go out to the universe, the more galaxies you will encounter, right? So, that means you encounter more 'space'...

Ok, this rubber sheet is a good analogy. So, the universe was somehow (we don't know how) infinite at the moment of the big bang, the earliest observable state. So, I suppose beyond the 'observable universe' there is no 'space'. It is some other stuff like exotic 'fields' or exotic matter. Is...

We know that 'space' is a thing. We live in it. So, are you saying that the 'spacetime' is also a 'thing', a real 'thing'? I thought 'spacetime' was just a mathematical concept which was used to explain GR. Here is what's very difficult to comprehend even in layman terms. You say that that...

Because when we the general public mean the universe, we mean the entire universe, everything, not just the observable universe.

Thanks, this is a good explanation. So, the big bang was the beginning of the observable universe, not the entire universe. Getting clearer now. But isn't 'space' the universe. Everything is inside space isn't it. So, are you saying that there was a universe without 'space' before the big...