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Lecture33 - Comet tails(other forces are small Viking space...

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Photons—Radiation Pressure Photons have no mass and always travel at the speed of light. The momentum of a single photon is: h / λ , or Radiation pressure = Energy Density (Force/Area = Energy/Volume) When radiation pressure cannot be neglected:
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Unformatted text preview: Comet tails (other forces are small) Viking space craft (would've missed Mars by 15,000 km) Stellar interiors (resists gravity) PetaWatt laser (10 15 Watts!) k h...
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