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Q21.An electron microscope uses electrons accelerated by a voltage of V. Determine the de-Brogliewavelength associated with the electrons. Faking other factors, such as numerical aperture etc. to besame, how does the resolving power of an electron microscope compare with that of an opticalmicroscope which uses yellow light?

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microwave> radiowave> x-ray>gammara

The kinetic energy of the electron is given as:E=eV= 1.6 × 10−19× 50 × 103= 8 × 10−15J



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