AP EAMCET202123 Aug 2021Morning ShiftPhysicsRay OpticsActual
The voltage applied to an electron microscope to produce electrons of wavelength 0.50 Å is
Options
- A602 ~V
- B50 ~V
- C138 ~V
- D812 ~V
Correct answer
A. 602 ~V
Step-by-step solution
Given, wavelength of electron, =0.5 Å By using de-Broglie wavelength, = h 2 m e V where, h is Planck's constant =6.63 10⁻³⁴ ~J - s , m is mass of electron, e is charge of electron and V is applied voltage. aligned V & = h^2 2 m e ^2 & = (6.63 10⁻³⁴ )^2 2 9.1 10⁻³¹ 1.6 10⁻¹⁹ (0.5 10⁻¹⁰ )^2 & =602 ~V aligned