1.

An electron microscope uses electrons accelerated by a voltage of 50 kV. If \[\lambda \] be the de-Broglie wavelength associated with the electrons. Also taking other factors, such as numerical aperture etc. to be same, the resolving power of an electron microscope be Re & that of an optical microscope which used yellow light is

A. \[\lambda =0.05\overset{\text{o}}{\mathop{\text{A}}}\,,{{R}_{e}}>>{{R}_{o}}\]         
B. \[\lambda =0.15\overset{\text{o}}{\mathop{\text{A}}}\,,{{R}_{e}}<<{{R}_{o}}\]
C. \[\lambda =0.11\overset{\text{o}}{\mathop{\text{A}}}\,,{{R}_{e}}<{{R}_{o}}\]
D. None of these
Answer» B. \[\lambda =0.15\overset{\text{o}}{\mathop{\text{A}}}\,,{{R}_{e}}<<{{R}_{o}}\]


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