Unformatted text preview: (c) Light waves move with respect to “what”? (d) Images don’t arrive from an object traveling at v at speed v + c . 5. Cosmos Episode 8 – Second clip • Setup: What would the world look like if one were able to travel close to the speed of light? (a) Clearly not part of our everyday experience – but all tests made to date agree with special relativity. We’ll see many examples over the next few weeks. (b) Length contraction: Back of the fast body ’catches’ up to front due to high speed (approaching speed of light) ⇒ length contraction (c) Images in “front” are blue-shifted (shorter wavelengths of light), peripheral images (and “behind”) are receding at close to speed of light and thus red-shifted (longer wavelengths of light). (d) Time dilation ⇒ twin paradox – harder to ’see’ physically but will be a consequence of our math....
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- Fall '08
- Special Relativity, Speed of light, 30 cm, 106 m