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Define the term scanning electron microscope.
Scanning electron microscope:
The scanning electron microscope (SEM) is a form of electron microscope which images the sample surface through scanning this with a high-energy beam of electrons into a raster scan pattern. The electrons interact along with the atoms which make up the sample producing signals which contain information regarding the sample's surface topography, composition and some other properties as like electrical conductivity.
What does it mean when a coulomb of charge has a certain number of joules?
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Cosmological redshift An effect where light emitted through a distant source seems redshifted due to the expansion of spacetime itself.
is average speed the magnitude of average velocity?justify your answer with a suitable example?
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Determine about the rod in magnetic coil the rod is placed in a magnetic coil deliver alternating current, the rod suffers a change within length for each half cycle of alterna
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calculate the frequency of radiation which must be incident on a substance placed in magnetic field strength so that the electron can absorb energy
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