Special relativity (AQA A-Level Physics): Flashcards

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Einstein’s theory of special relativity
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What is an inertial frame of reference?

Frame moving at constant velocity relative to other frames

Which frames cannot be inertial?

Accelerating or rotating frames

What does special relativity describe?

How motion affects length, time, mass near speed of light

1st postulate of special relativity

Speed of light is invariant for all observers

Speed of light in vacuum

3.00×1083.00 \times 10^{8} m/s

2nd postulate of special relativity

Laws of physics same in all inertial frames

What is time dilation?

Time moves slower for moving observer vs stationary observer

What is length contraction?

Objects at high speed appear contracted in motion direction

What is relativistic mass increase?

Mass increases as object approaches speed of light

What frames does special relativity apply to?

Inertial frames of reference only

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