First slide

Diffraction

Question

The resolving power of an electron microscope can be increased by

Moderate

A

Increasing accelerating potential
B

Decreasing accelerating potential
C

Using red rays instead of ultra violet rays
D

Using ultra violet rays instead of red rays

Solution

$r e s o l v i n g p o w e r i s i n v e r s e l y p r o p o r t i o n a l t o λ a n d λ = \frac{12.27}{\sqrt{V}} d e B r o g l i e w a v e l e n g t h o f e l e c t r o n$

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