question_answer

In an electron microscope, the resolution that can be achieved is of the order of the wavelength of electrons used. To resolve a width of  m, the minimum electron required is close to- [JEE Main 10-Jan-2019 Morning]

A) 25 ke V

B) 500 ke V

C) 100 ke V

D) 1 ke V

Correct Answer: A

Solution :

[a]

is of order of wavelength of light