Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Weird idea: Dark emitters

  1. Jun 23, 2010 #1
    Since 7, I always have a weird idea in mind
    As light can be in any colors, then why not black

    Later at 15, I understand that black = absence of (visible) light (photons)
    but would it be cool if we have a lamp that shines darkness?

    I once have discussed this idea with my physics teacher before.
    Original idea: Something that acts like light (I'll call them Dark photons), that is the opposite of light, when the two collide, they aniliate each other, rendering the result area dark, so it'll look like a lamp that project darkness

    but my physics teacher said this does not work as
    1. The antiparticle of photon is itself
    2. It violates the conservation of energy

    Instead he modified my idea a bit and propose a new proposal
    New idea: Instead of acting like EM waves, why not have a stream of particles (or even quasiparticles) that radiated from a source in all directions which converts all visible photons that collided with them into IR (simply like a frequency modifier), as IR is invisible to humans, it can produce the same dimming effect. He also think the dark emitters, if possible can have a wide variety of applications

    At that moment i thought it'll be a good idea, but after some careful thoughts, i think it (the new idea) 'll pose radiation hazard to organisms (e.g. overheating, Sunburns etc.) (including humans)

    Guys what do you think of it and is it possible to produce a dark emitter that is safe, using known laws of physics?
  2. jcsd
  3. Jun 23, 2010 #2
    Actually, photon nullifiers have been around for a while. I have a couple in my back yard with a hammock strung up between them.
  4. Jun 23, 2010 #3
    Yes turn off the lights.
  5. Jun 23, 2010 #4
    build a small version of the LHC and put it on a lamp post. when you flick the switch all the mini black holes it creates will suck in nearby light (just don't walk too close)
  6. Jun 23, 2010 #5


    User Avatar
    Gold Member

    Well, what would happen if you used noise canceling principles and superposition on electromagnetic waves in the frequency of visible light?
  7. Jun 23, 2010 #6


    User Avatar
    Gold Member

    I think noise canceling only works because electrical signals can propagate much faster than sound waves. You couldn't cancel light, because you couldn't anticipate it in time to do anything about it.
  8. Jun 23, 2010 #7


    User Avatar
    Science Advisor
    Homework Helper

    Are there any "dark spots" in the double slit interference pattern?
  9. Jun 23, 2010 #8
    Photon can be converted to axion, according to some theories.
  10. Jun 23, 2010 #9


    User Avatar

    Staff: Mentor

    We don't discuss scifi as a possibility.

    Secret, you are aware of this from your feedback thread.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook