Light has no mass so it does not experience time. Everything happens instantly for it. While it takes us 10 years to wait for light to travel 10 light-years, t

Light has no mass so it does not experience time. Everything happens instantly for it. While it takes us 10 years to wait for light to travel 10 light-years, the light takes no time at all. This explains it perfectly: http://www.askamathematician.com/2011/07/q-does-light-experience-time/ http://www.askamathematician.com/2011/07/q-does-light-experi...