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0 votes
13.1k views
in Physics by (34.4k points)

The speed of electrons in a scanning electron microscope is 1 × 107 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:

(1) 1837

(2) \(\frac{1}{1837}\)

(3) \(\sqrt{1837}\)

(4) \(\frac{1}{\sqrt{1837}}\)

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1 Answer

+1 vote
by (34.9k points)

Correct option is (1) 1837

Resolving power (RP) ∝ \(\frac 1\lambda\) 

\(\lambda=\frac{h}P=\frac h{mv}\)

So (RP) ∝ \(\frac{mv}h\)

RP ∝ P
RP ∝ mv
RP ∝ m

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