Question

What potential must be applied on an electron microscope so that it may produce an electron of wavelength 1Å​

Answer 1

Answer:

150 volt

Explanation:

Energy gained when subjected to voltage, V is given as E=eV

So wavelength will be λ=

=2mE=2m(eV) so volatge V=

2Where h is planck's constant and m is mass of electron.

Putting all values we get V=

2×9.1×1031

Kg×1.6×1019

C×(10 0

meter)

(6.62×10mmmm34Js) 2