Not exact matches
Instead, the researchers shot in a
beam of
electrons to generate light of all
wavelengths within the waveguide and measured the light leaking out of it.
But a laser can set up a quantum - mechanical interference that blocks the
electrons from making the jump, allowing a second
beam at the normally absorbed
wavelength to zip through.
Neil's machine produces coherent laser light directly from an
electron beam, allowing it to create any
wavelength of light — in other words, any color on the spectrum.
An
electron beam can be manipulated with magnets to produce a
beam of any
wavelength.
The sharp acceleration turns the traveling
electron wave into a plane wave, like a nice regular pulse of an
electron beam with an extremely short
wavelength — exactly the kind of
beam useful for imaging.
With much shorter
wavelengths than photons of visible light,
electron beams can be used to observe objects hundreds of times smaller than those that can be resolved with an optical microscope.
Single - grain major and minor element compositions were measured using
electron microprobe
wavelength dispersive spectrometry at the University of Oxford Research Laboratory for Archaeology and the History of Art, using a Jeol JXA8600
electron microprobe, in
wavelength dispersive mode, with 15 - keV accelerating voltage, 6 - nA
beam current, and 10 - μm defocused
beam.