Car in factory, before departure for the speed trials
This is car during speed trial - at a speed 0.7 lorenz (comment)
The main consequence of the Particular Relativity Theory is shortening of moving objects.
It is quite clear ! The measurement of the length is done by detecting the echo from the ray of light sent to the car. The ray reflected from the front of the incoming car turns back quicker, and that reflected from end of the car arrives later, and in the meantime this end is closer.1)
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Car in factory, before departure for the speed trials |
This is car during speed trial - at a speed 0.7 lorenz (comment) |
Glossary
1 lorenc = present light speed in the vacuum 2,99792458 (1,2)x108 m/s [reead: three hundred thousand kilometers per second]
Notes:
The reader is warned that of course such an explanation based on Doppler's effect is wrong, because a car moving away would be longer. Please, find yourself some explanation on Galileo's and Lorenz's transformations in a wise book.
Besides, the title is also wrong, because this is the measurement of the length in another reference system which is shorter, not dimensions of the car as experienced by its passengers
Any interesting comments please direct to tomek@wsp.slupsk.pl. Thanks in advance!!