If the sun is not hot enough how it performs fusion?
Our star Sun is really hot, we are talking about some serious temperature's here. The temperature of it's core is about 15 million degree Celsius but the problem comes here, theoretically for fusion to occur we need temperature of about 100 million degree Celsius ,so how come our sun perform fusion !HOW! . Now without wasting any time let's dig for the real answer. For fusion to occur protons need to be push so hard against the Electromagnetic repulsion between them that they pass the coloumb barrier after which Strong force takes the control and they fuse. But our sun is not hot enough to do this (remember temperature is a measure of kinetic energy) , but its temperature is enough to push and bring the protons close to the coloumb barrier , and here the magic happens. And to get it we need to get a little "Quantum" here the phenomenon of quantum tunneling takes control ,and another thing to consider is that in a given te