The Young Experiment by HapyMetal

HapyMetal

47 / 2

15th May 2016

9th February

Part two of "Fameous Experiments" series. I hope you like it, and further suggestion are welcome.

both science

Comments

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  NoVIcE 11th Jun 2016
  No, it's a particle with a wavelength...
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  Nurgle33 25th May 2016
  it is both a wave and a particle
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  AngryBlock101 19th May 2016
  It's Both, A Wave And A Particle!
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  NoVIcE 19th May 2016
  Indeed it is a particle with a wavelength. That's why light from distant stars in the universe are redshifted because of the Doppler effect, which is caused by the expanding of the universe, maybe the reason we see redshift everywhere is because there's no center of expanding of the universe, just everywhere more space is created. If there were a center, we would see a blueshifting in one direction, and redshifting in the other. I think I got a little out of topic.
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  HapyMetal 17th May 2016
  This question is about 250years old: What is light? A Particle with a mass, or a wave only. It's so simple: Light is what appears when i press the switch ;-p
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  atomic2385 17th May 2016
  make a photoelectric effect save to show the particle behaviour of light as well
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  atomic2385 17th May 2016
  also, black holes being black is more evidence for general realtivity. if gravity was simply an effect of mass, light mould not be affected. however light is affected- black holes are black and stars 'move' around the sun. this means that spacetime itself is warped around mass, so the 'straight lines' that light travels in are also bent, into the black hole
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  atomic2385 17th May 2016
  light does not have mass, it has momentum. the momentum is given by P=h/wavelength where h is Planck's constant. electrons also have wavelength uins the same formula. solar sails work on the principle of conservation of momentum
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  dlaudghks 16th May 2016
  so thank you
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  Technomancer 16th May 2016
  Light DOES have mass. That would be why NASA designed spacecraft with light-sails. That can only work because light exerts (miniscule, but non-zero) pressure when it strikes an object. In other words, it transfers kinetic energy. Therefore, it has mass. Also, if light had no mass, it would be unaffected by gravity, and black holes wouldn't be black, they'd be blindingly bright.