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  • Lasers and Collimation - Physics Stack Exchange
    Lasers are not perfectly collimated In fact, according to an analogue of the Heisenberg Uncertainty Principle, it's fundamentally impossible to create a perfectly-collimated beam of light from a finite-sized source Why? If the light is traveling in the z direction, and it's perfectly collimated, then the photon momentum in the x and y direction is exactly zero Which means the photon
  • Why does a laser beam stay collimated? - Physics Stack Exchange
    I am looking for a simple way of explaining the collimation of a laser beam The typical discussion of the two slit experiment of quantum theory relies heavily on the Huygens principle Its applica
  • What is the best way to collimate light emitted by a LED?
    9 One cannot collimate light from an LED accurately without loosing a great deal of light and or being happy with a very wide collimated beam, because the source is often quite a wide extended source (sometimes up to 1mm across)
  • How can a lens collimate an image instead of just a point of light?
    A lens cannot collimate an image It can take the light from each point of the image into a collimated beam in a different direction Your eye can take a collimated beam and focus it to a point on your retina It can take beams in different directions and focus each to a different point, thus reconstructing the image Edit - A ray diagram will
  • Can the neutrons in a nuclear reactor be collimated?
    N B I am not a physicist My layman's understanding of a nuclear reactor is essentially that neutrons are doing one of 4 things at any given time in the reaction chamber: Flying freely around
  • electromagnetism - A difference between Plane Wave and Collimated . . .
    However, if the intensity differentials are accounted for than assuming a small plane wave or collimated vectors will produce an exact mathematically and experimentally verifiable result Thus, multiple texts and sources will unexpectedly state that the momentary wave at such a position is collimated or a plane-wave front
  • optics - Why cant incoherent light be collimated as well as laser . . .
    But this also makes the complete device a much larger light source, so collimation of the light it produces is considerably harder The lasers, on the other hand, are used directly as bare crystals behind the collimating lens, so they look much like point light sources, which can easily be collimated
  • Why do we need collimated light on a diffraction grating?
    If the beam wasn't collimated then light with different wavelengths but from different parts of the source, arriving at different incidence angles, would be diffracted in the same direction This would spoil your wavelength discrimination, contradicting the whole purpose of a diffraction grating
  • angular momentum - Why are pulsars radiation beams collimated . . .
    Ah, but the radiation is only collimated because it was emitted by a relativistic, collimated jet of matter
  • Is it possible to collimate a point source of concentrated light?
    The picture is misleading because it is not to scale (obviously), but the relationships still apply in any imaging situation You can collimate the light from the image of the sun - but because the image that you made has a finite extent, the collimated beam formed will have some angular spread - it will not be "perfectly" collimated





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