The speed of electron in a scanning elec...

The speed of electron in a scanning electron microscope is `1 xx 10^(7) ms^(-1)`. If the protons having the same speed are used instead of electrons, then resolving power of scanning proton microscope will be changed by a factor of:

A

1837

B

`1/(1837)`

C

`sqrt(1837)`

D

`1/sqrt(1837)`

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