Paradoxes
A paradox is a situation where two contradictory conclusions are reached from valid premises, that are acceptable to anybody, one of the most famous examples of this are the Twin paradox.
Simultanity
Events occurring at the same time or place from your viewpoint may not be doing so for someone else in relative motion
Simultaneity is relative, and not an absolute concept.
Simultaneity is relative, and not an absolute concept.
Length Contraction
Using the fact that time is relative we can show that length is also relative like time dilation this effect,
Length Contraction, while insignificant in everyday situations becomes very important when approaching the speed of light.
The length of a moving object in the direction of travel is shortened,
Length is relative not absolute, absolute length does not exist.
Length Contraction, while insignificant in everyday situations becomes very important when approaching the speed of light.
The length of a moving object in the direction of travel is shortened,
Length is relative not absolute, absolute length does not exist.
Velocity addition of speeds close to the speed of light
Einstein's second postulate states that the speed of light in a vacuum is c regardless of the speed of the light source or the speed of the observer
The reason Newtonian Physics can not be used in questions where the speed is close to the speed of light is because in Newtonian physics addition is possible where the outcome is greater than c, which would be a violation of Einstein's second postulate, the correction to the Newtonian Physics comes in the form of changing the equation so the resultant velocity is less than c
The reason Newtonian Physics can not be used in questions where the speed is close to the speed of light is because in Newtonian physics addition is possible where the outcome is greater than c, which would be a violation of Einstein's second postulate, the correction to the Newtonian Physics comes in the form of changing the equation so the resultant velocity is less than c