Cool Did You Know Milk Travels At The Speed Of Light References. Web discover why the sky is dark at night and why space appears dark understand refraction and why the speed of light changes when it travels through glass understand how diffraction of light affects stellar images scientists simulating travel at the speed of light. Answering those questions takes us on an amazing journey through space, time, physics.

Once you see the reality of that speed, you may rethink everything. The speed of light is commonly denoted by a c in equations. Web so the short answer to the question is that a photon knows to travel at the speed of light because it is massless.





