Recent content by pberrett

  1. P

    A question about the thrust of light

    Lol. I,m an amateur radio operator so I should know that at least. I got mixed up and thought that the equation was talking about frequency , not wavelength. Cheers Peter
  2. P

    A question about the thrust of light

    I just found this interesting video which touches on all of the above but approaches it from a mathematical point of view. Interestingly it concludes that momentum = planks constant divided by wavelength. Does this mean that, if you instead of transmitting the light using a torch as detailed...
  3. P

    A question about the thrust of light

    Thanks for that. May I pose a followup question then? To have momentum the photons must have mass, albeit very small. I know that ion drives get drive power by accellerating ions to very high speed. Lets say our spacecraft had long tube with a very bright light at one end and shining down...
  4. P

    A question about the thrust of light

    Hi everyone I am a layman at physics am would be very grateful if someone could assist me with a question about propulsion. The question arises from an article I recently saw discussing NASA's testing of a Cannae Drive...
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