Science question...

[renegade7]

So, the fastest anything can go in the universe is c, the speed of light. The reason is that light has no mass, and thus requires no force to continue moving.

So how can light be affected by gravity, if it has no mass? My science teacher today couldn't offer a straight answer.

 

[SckizoBoy]

General relativity... & light deflection, though I think frequency shift is also pertinent, but I hardly understand it myself...