Question

In Davisson-Germer experiment, intensity was maximum for accelerating voltage equal to

• A. $44$
• B. $54$
• C. $64$
• D. $74$

Answer 1

The correct option is B $54$

In Davisson-Germer experiment, maximum intensity of diffracted electron beam was found at different angles by varying the applied voltage to the electron gun. The highest intensity was observed at an angle $\varphi ={50}^o$ with a voltage of $54V$, giving the electron a kinetic energy of $54eV$.