Question

How does a red shift give evidence to big bang theory?

Answer 1

Hint: In this question, we will first know about the Doppler’s shift and about the Doppler’s red- shift. Further, we will know about the big bang theory and how it is connected to red-shift. This will give us the required explanation to our answer. At last, we will know about the basics of the sun.

Complete solution:
As we know that the Doppler red-shift of light that is observed from distant stars and galaxies, tell us the information about the universe is expanding or we can say, moving away from a central point. Now, this allows for the Big Bang Theory, because after a bang occurs all of the matter present moves away from the point of origin.

We know that a redshift in light indicates that the object or the body is moving away from the observer. So, this is called the Doppler shift.

If we try to understand by taking an example of standing by a railroad track and listening to the train whistle. Here, when the train is moving toward us the sound is higher or we can say, the waves are closer together when the train passes by us the sound changes to a lower pitch or we can say, the waves are further apart.

So, in our question, if we say that the universe is moving apart then it must have been closer together in the past. We know that in classical Big Bang theory the central point is assumed to have been a giant dense ball of matter. This giant and super dense ball was so dense that it was unstable , so it exploded. Finally, this explosion of unstable dense balls caused the universe that we presently observe.

Additional information:
As we know that the sun is actually a giant ball of gas and plasma that gets hotter and denser as we go from the outer rim to the centre. Now, we know that the temperatures run from 5780K on the outer visible layer which is called the photosphere, to about 15 million Kelvin in the middle of the sun.

Note:
We should remember that the blue light has waves that are closer together, whereas the red light has waves that are further apart. Also, note that the big bang theory is about the universe that is moving apart from a central point that once existed.