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An electron microscope is used to probe ...

An electron microscope is used to probe the atomic arrangement to a resolution of `5 Å`. What should be the electric potential to which the electrons need to be accelerated

A

2.5 V

B

6 V

C

2.5 kV

D

5 kV

Text Solution

Verified by Experts

The correct Answer is:
B
`lamda =5Å`
`lamda = (1.22)/sqrtV xx10^(-9) implies 5 xx10^(-10)=(1.22)/(sqrtV) xx10^(-9)`
`implies V = 5.95 V ~~ 6V.`
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