World Science Scholars
6.3 Train View

Check out this interactive demonstration, which shows how light emitted from the bulb travels according to those on the train. Using the slider, pick the speed of the train. Hit start and notice what happens to the two flashes of light. Reset the animation, change the speed, and hit start again. Does the motion of the light change? No. You’ll see that the speed of the train does not matter. Because its motion is constant, people on the train can legitimately claim that they are at rest while the railroad track is passing them by. Therefore, from the train perspective, the two flashes always reach the front and back ends of the train at the same time.


Share with others

Select this checkbox if you want to share this with all users

Select Users

Enter the usernames or email IDs of the users you want to share with

Please enter message

Explain why you want them to see this

Send this to a friend