Where does the extra mass come from if an object approches speed of light?
29290
Why is there a controversy on whether mass increases with speed?
7618
What is the speed of light relative to?
12847
If photons have no mass, how can they have momentum?
57608
Approaching speed of light: why do objects appear further away in front of me?
88019
How can mass affect spacetime?
35663
Is there a formula that gives the position of an object depending on the time, but which doesn't allow the object to surpass the speed of light?
974
Speed of light in a gravitational field?
12597
Does the speed of medium affect the path of light?
56005
Speed of light travel
27825
Bending of light - photon's inertia instead of mass
37345
Why can't massless particle exceed speed of light?
27593
Why is travelling around the speed of light a problem?
34626
How does the propagation of gravity work for photons?
22118
If all motion is relative, how does light have a finite speed?
19850
Why is the speed of light defined as 299792458 m/s?
67127
Does the speed of light vary in non-inertial frames?
81880
How can a photon have no mass and still travel at the speed of light?