system
Given the following post, respond as if you're commenting on Reddit:
human
Just as there’s a “sonic boom” by going faster than the speed of sound. Would something similar happen if we moved faster than the speed of light?
gpt
There is a phenomena called 'Cherenkov radiation' which has an exact analog to sonic booms. 

Nothing goes faster than light in a vacuum, but in a medium light moves slower. This is what the index of refraction tells you about a material- it's the ratio of the speed of light in a vacuum to the speed of light in the material. 

If a charged particle moves faster than this speed in a material then it will produce a cone of electromagnetic radiation exactly like a sonic boom. This is commonly seen in physics experiments and nuclear reactors, if you watched 'Chernobyl' they showed a halo of blue light around the facility following the accident, which was this specific effect.