Relativity in Length Active Physics

Again using Active Physics, concepts from relativity are explored. This time Length contraction is explored.
http://media.pearsoncmg.com/bc/aw_young_physics_11/pt2a/Media/ModernPhysics/1702RelOfLength/Main.html
 In this experiment light is going in the same direction as motion.

The time measurement of a round trip for the ray in the lights frame is independent of weather the light clock is moving relative to the earth or not.

The round trip time interval as measured on a stationary point on the earth will be longer than the frame of reference of the time clock.

• As mentioned in the previous lab, time dilation in one frame is the product of the Lorentz factor and the proper time. This is consistant with what is observed here.

The light clock shrinks in the second frame. If it didn't and the lengths in both frames were the same, then the the the dime dilation relation couldn't hold true.

If the length of the light clock were 1000m (propper length) to find the length in the second frame we can use the relation, the length in any frame is given by the proper length divided by the Lorentz Factor. If the Lorentz factor were 1.3 the the length of the clock in the second frame would be(1000)m/1.3=769m