Re: What is a diffraction order?

redbelly <redbelly98@xxxxxxxxx> wrote:
> "Diffraction order" refers to diffraction gratings, and the angles of
> the beams that are either reflected from or transmitted through them.
>
> A diagram would illustrate the concept better than I could describe
> with text alone. It might help for you to Google "diffraction grating"
> and look for a figure that explains the concept.
>
> At any rate, here is my text description of diffraction orders. Again,
> a diagram is really required to understand it:
>
> The (reflected or transmitted) beams from a grating have the following
> property: the optical path difference for adjacent rulings on the
> grating must be an integer multiple of the wavelength. This integer
> gives the order for that particular beam.
>
> So:
> The zero-th order beam has an optical path difference of zero between
> rulings,
> The first order beam has an optical path difference equal to one
> wavelength,
> The second order beam has ... two wavelengths,
> etc. etc.
>
> Mark


Hi Mark,

I believe I know which diagram you're talking about -- the one used to
describe (for example) wave interference for Young's double slit, where you
show that d \sin(\theta) = n \lambda.

If so, then I totally understand your explanation. Thank you!

Pete
.

Relevant Pages

  • Re: shear and moment diagrams
    ... with no explanation of just what the diagram is visualizing. ... The shear diagram is deisgned to help visuallize the total forces on a beam, ...
    (rec.crafts.metalworking)
  • Re: What is a diffraction order?
    ... "Diffraction order" refers to diffraction gratings, ... A diagram would illustrate the concept better than I could describe ... The zero-th order beam has an optical path difference of zero between ...
    (sci.optics)
  • Diagramming stresses in a section with excel
    ... I've created a diagram with Excel about a section of steel of a beam. ... have some loads and the cell with values for each section. ...
    (microsoft.public.excel.programming)
  • Re: c+v and Sagnac
    ... but they still arrived at the beam splitter with zero phase ... A model of the Moon's wavelength? ... the path lengths are equal when there is no rotation. ... player turntables with strobes. ...
    (sci.physics.relativity)
  • Re: c+v and Sagnac
    ... are therefore doppler shifted in opposite directions in that frame. ... but they still arrived at the beam splitter with zero phase ... A model of the Moon's wavelength? ...
    (sci.physics.relativity)