goring
Lv 6
goring asked in Science & MathematicsPhysics · 1 month ago

# How come motion at near light speed things get shorter?

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• 1 month ago

That happens ONLY for the observer at a distance because of time dilation and general relativity and special relativity because the observer is also moving., the rate of time changes for the observer and the object moving at relativistic velocities. The object does NOT become shorter physically in the object's own inertial frame of reference. The rate if time passing for the object moving at relativistic speeds, but for the observer at a distance, the rate of time for the object seems to become slower and slower and the apparent length of the object becomes shorter. For the observer at a distance, the rate of apparent time passing does not seen to change, but for am observer on the relativistic speed object, the other observers clock seems to speed up and they seem to add very quicly and die because of time dilation.

• 1 month ago

At high speed RELATIVE TO SOMETHING ELSE something is observed to be shorter. There is no such absolute speed as "near light speed".  You don't know which is moving.  Things don't GET shorter.  They don't change as a result of altering, or having, a speed.

• 1 month ago

It's a contraction of space in order to make the speed of light the same in all frames of reference. Equations of special relativity describe it mathematically.

If you ask why this happens, nobody knows.

• goring
Lv 6
1 month agoReport

may be Einstein knows