[quote]Yes it does, hence why black holes are able to absorb light. If light had no mass, it would remain unaffected by gravity. Light is a particle as well as a wave.[/quote] Light doesn't have mass. It's affected by Gravity because Gravity warps space-time around it. So when light travel to blackhole, they are going straight but space-time around it is warped to abnormal degree, light get 'sucked' in.