Exam (elaborations)
I. Special Relativity Questions and Answers 2024
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I. Special Relativity
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I. Special RelativityMichelson-Moreley experiment - answer1. Showed speed of light is constant for any
observer in any reference frame
2. There is no unique universal stationary reference frame
3. There is no eather
4. Newton's Laws break down at the speed of light because distance and time are
linked by consistency of the speed of light
Special Theory of Relativity - answer-by Einstein
-everyone sees the same speed of light
-no one can prove that it is constant
-only occurs in special case where motion is uniform
-only through relativity, Earth is always moving so is can't have special relativity relative
to space
Inertial reference frames - answerconstant velocity
Two postulates for special relativity - answerOnly in Inertial reference frame
1. All laws of nature are the same regardless of the reference frame of observer
2. The speed of light is constant in all reference frames
Relativistic Time Dilation - answer-light clock
-relativistic time (t) vs local time (to)
-travels by velocity v
-as v gets closer to c (speed of light), the observed time (t) gets longer
-time appears to run more slowly in moving objects
Relativistic Length Contraction - answer-L is observed, Lo is actual
-objects appear to be shorter in the direction of motion
-as velocity increases, L gets smaller
Relativistic Mass Increase - answer-m is observed, mo is actual
-moving objects appear to be more massive
-can never reach v=c because F=ma and m increases without a bound
-mo is "rest mass"
E=mc^2 - answer-relationship between mass and energy
-a little mass creates a lot of energy
-energy comes from mass (like firewood)
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