How can light travel in a vacuum?
14043
Why don't electromagnetic waves require a medium?
14615
Can electricity flow through vacuum?
101152
Can vacuum fluctuations change the position of an electron?
58404
Does vacuum (empty space) exist?
27365
Why can't light escape from a classical black hole?
64508
Where exactly does energy quantisation come in for light?
100599
What is the trajectory of a photon moving through a vacuum?
72913
Why does a light wave fade as it travels through space?
50289
The vacuum light speed: Is it really constant, i.e., independent of location in space-time?
142906
How can a particle in a medium ever travel faster than light?
58728
Why does the speed of light in vacuum have no uncertainty?
114388
Why doesn't more light bounce off of things in the manner of sound?
78223
How does a photon travel through glass?
138161
Why is space a vacuum?
98902
How can particles be emitted from particles?
40148
Does light have mass?
19829
Is light affected by gravity? Why?