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Describe the resolution of the scanning electron microscope.
Resolution of the SEM (scanning electron microscope):
The spatial resolution of the SEM depends onto the size of the electron spot that in turn depends onto both the wavelength of the electrons and the electron-optical system that produces the scanning beam. The resolution is also restricted by the size of the interaction volume, or else the extent to that the material interacts along with the electron beam. The interaction volume and spot size are both large compared to the distances among atoms, therefore the resolution of the SEM (scanning electron microscope) is not high sufficient to image individual atoms, as is probable in the shorter wavelength (that is higher energy) transmission electron microscope (TEM). The scanning electron microscope has compensating advantages, while, including the capability to image a comparatively large region of the specimen; the capability to image bulk materials (not just thin foils or films); and the variety of analytical models obtainable for measuring the composition and properties of the specimen. Depending onto the instrument, the resolution can fall somewhere in between less than 1 nm and 20 nm. The world's highest scanning electron microscope resolution is obtained along with the Hitachi S-5500. Resolution is 0.4nm at 30kV and 1.6nm at 1kV. Usually, SEM images are easier to interpret than TEM images.
What are the applications of laser transitions? Applications of laser transitions: a. High coherence of light is helpful for measuring length precisely by interferometry or
which circular path in any time in any mation
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#what are practical examples of like and unlike parallel forces?#
Need a word that descripes relationship of parabolic function? Thanks!
Hydrogenation reactions are facilitated by the use of a transition metal catalyst such as Ni or Pt. Predict the signs of ΔH, ΔS and ΔG when hydrogen gas is adsorbed onto the surfac
State the Working of UJT Make circuit arrangement as demonstrated in fig.(c), where UJT is represented by its equivalent circuit comprising resistances R B1
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NEWTON ? "The force which forms an acceleration of 1 ms-2 in a mass of 1 kg". It is represented by N.
Carnot's theorem (S. Carnot) The theorem which states that no engine operating among two temperatures can be more capable than a reversible engine.
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