Einstein's special theory of relativity implies that if a person standing at the front of a train traveling at 0.1 km/s shines a flashlight out in front of the train, the emitted photons will travel at a speed of 300,000.1 km/s.

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According to Einstein's special theory of relativity, the speed of light is constant for all observers, regardless of their relative motion. Therefore, the emitted photons will still travel at a speed of 300,000 km/s, regardless of the speed of the train.

Einstein's Special Theory of Relativity Implies That If a Person