The speed of electrons in a scanning electron microscope is \( 1 \times 10^{7} \mathrm{~ms}^{-1}...

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The speed of electrons in a scanning electron microscope is \( 1 \times 10^{7} \mathrm{~ms}^{-1} \). If the protons having the same speed are used instead of electrons, then the resolving power of scanning proton microscope will be changed by a factor of
(a) 1837
(b) \( \frac{1}{1837} \)
(c) \( \sqrt{1837} \)
(d) \( \frac{1}{\sqrt{1837}} \)
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