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## Main Question or Discussion Point

How can two events happening at the same time and place in one frame of reference happen at a different time and place in another frame of reference?

For example:

If you are standing at the side of a road and you see a car going at 0.6c and 8 light seconds down the road in both directions someone is shining a flashlight toward the car.

From the car's point of view the two beams of light should reach his car at the same place and at the same time. But from the observer's point of view the two beams of light reach the car at two different times and at two different places.

How can two events happen at the same place and time in one frame of reference and not in another?

For example:

If you are standing at the side of a road and you see a car going at 0.6c and 8 light seconds down the road in both directions someone is shining a flashlight toward the car.

From the car's point of view the two beams of light should reach his car at the same place and at the same time. But from the observer's point of view the two beams of light reach the car at two different times and at two different places.

How can two events happen at the same place and time in one frame of reference and not in another?