What if an asteroid hit Earth at speed of light?

Friends, we are the biggest mystery of this world, i.e. how life came into this world, life does not flourish in every planet, then how life came, gave many theories to scientists, in which people agreed or disagreed, did life in this earth come from meteorites?  Does a meteorite fall on the earth cause a big explosion? Scientists believe that meteorites had fallen 10 thousand years ago, which killed all the living beings present on the earth. 

First of all, try to know what is a meteorite, it is called  Those which are made of small and big rocks and elements keep roaming in the universe, which fall on our earth from outside. Every day, small and big meteorites come into the atmosphere due to the gravity of the earth, but after crossing the two layers, the meteorite enters the atmosphere.  melts when superheated by friction.

The meteorites that collide with the Earth, that meteorite reveals a lot about our universe. Did the meteorite fall to life or life ended? Scientists have said that when the Earth was being formed and when the continent surface  But when the meteorites filled with dense minerals started heating up and falling on the earth, due to which some movement started in the earth, a special type of protein called peptide started forming in the earth, this cycle started running, this protein started getting molded in the hot atmosphere and  This was the world's first genetic code called RNA. Scientist Pearce and Pudrit are trying to create organisms using this protein, but it has not yet succeeded. 

A meteorite can be as small as sand if a meteorite is  What will happen if left at the speed of light in the earth, no object can take the speed of light, it is a hypothetical but it can be ascertained through theory, as soon as it enters the atmosphere, nuclear fission will start in the meteorite.  

After colliding in the most dangerous explosion ever  The explosion will happen 10 thousand years ago, the meteorite collided, it was only in the speed of 20kilometres per hour, if the meteorite made of diamond carbon fell without melting, then it would be so fatal that the debris would come out from the earth's core and it may be that the earth's  It will go inside which will break 1/4 part of the earth into pieces and it will be scattered in the universe and the pieces will go to another planet.  What would happen if meteorites hit the earth at the speed of light?