Wave OpticsHard
Question
In an microscope the accelerating voltage is increased from 20 kV to 80 kV, the resovliving power of the microscope will become
Options
A.2R
B.
C.4R
D.3R
Solution
We know that wavelength and accelerating voltage for an electron is related to eashother as folloes
λ ∝
[Vpotntial applied and resolving power ∝ 
So resolving power ∝ √v
Now if potential used is increased 4 times, resolving power will be increased 2 times So. if resolving power earlier is R. It becomes 2R.
λ ∝
[Vpotntial applied and resolving power ∝ So resolving power ∝ √v
Now if potential used is increased 4 times, resolving power will be increased 2 times So. if resolving power earlier is R. It becomes 2R.
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