Einstein’s Experiment Welcome! You are encouraged to register with the site and login (for free). When you register, you support the site and your question history is saved.In the famous thought experiment that inspired the theory of relativity, Einstein asked himself whether a beam of light would look the same to an observer moving alongside the beam at the same speed as an observer who was stationary. speed as an observer speed as to an observer speed; just as it would to an observer speed, as it would to an observer speed; just as to the observer Review Answer