Recent content by shawn9521

Let's say you have a sound emitter and receiver a fixed distance apart on a moving object but open to the air, such as on the hood of a car. The emitter is near where the windshield wipers are, and the receiver is closer to the grill. They are in aligned along middle of the car, longitudinally...

Alright, thank you very much @Ibix! You have given me the exact answer I was looking for, even though it wasn't the one I wanted to hear haha. You actually hit the nail on head of what I'm trying to do, and that is trying to come up with some way for a vehicle to tell how fast it is moving using...

Thanks for the answers, and sorry that my question was confusing. @Ibix interpreted my question the way I wanted to ask it. I wasn't concerned about the acceleration of the train. We can assume that the laser is turned off when the train is accelerating, and turned back on once the train gets to...

Edit: Sorry, the title should say LIGHT, not time! << Mentor Note -- Title updated >> Let's say you're on a train, in the back of a car. The train is stationary. You shine a laser to the front of the car, and you can measure the time it takes for the laser to reach the wall. Now, if the train...