“They were also able to create extreme conditions in which the light signal travelled faster than 300 million meters a second. And even though this seems to violate all sorts of cherished physical assumptions, Einstein needn’t move over – relativity isn’t called into question, because only a portion of the signal is affected.”

What?!?!?!

THat’s not an explanation. it’s more like a car salesman explaining how a lease is much cheaper than buying because the payments are amortized over blah blah blah. talk to the hand.

When light travels from one medium to an another medium it changes its direction which we call refraction.What is the reason for the light to change its direction when it travels.outdoor solar lights