Are electromagnetic and gravitational waves the only known types of waves that can travel in empty space?
97464
Are there weak force waves?
37941
Can light travel slower than the maximum?
116627
Why doesn't a charged particle moving with constant velocity produce electromagnetic waves?
43505
Why is there no gravitational magnetic field? (Or, is there?)
55992
Why is dipole the simplest source in electrodynamics?
151039
Why are there no elementary charged, spin-zero particles?
138725
Why gravitational waves are not produced by objects moving at constant velocity?
35085
If both radio waves and gamma rays can travel through walls
17152
Do all massless particles (e.g. photon, graviton, gluon) necessarily have the same speed $c$?
129049
Electromagnetic black hole?
83824
Are energy and momentum separable for EM waves
125019
What is thermal radiation? How does it move through space?
56005
Speed of light travel
147587
Do gravitational waves slow down as they pass through matter?
72913
Why does a light wave fade as it travels through space?
38039
Are gravitational waves longitudinal or transverse?
38909
Do photons and cosmic rays radiate energy through gravitational waves? If not, why not?