An observer on the train in the following figure stands in the back of the car. He turns...

An observer on the train in the following figure stands in the back of the car. He turns on a light and measures the time it takes for the light to get to the front of the car, bounce off a mirror, and return to him. (Assume that the light is traveling in a vacuum.) Knowing the length of the

car, he can calculate the speed of light. Will he obtain a speed less than, greater than, or equal to c? Explain.