Special relativity and time

More about simultaneity, time dilation and the famous case of the travelling twin

The definition of “now”

Why it is necessary to define simultaneity, and how best to go about defining it.

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Time dilation on the road

How you can picture the relativity of simultaneity and time dilation, using a simple geometric analogy

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The case of the travelling twins

Why the so-called “twin paradox” isn’t really a paradox

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Twins on the road

How one can picture the situation of the travelling twin, using a simple geometric analogy

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