Question

The Davisson-Germer experiment was performed by varying the accelarating voltage from __ V to __ V.

• A. $44,68$
• B. $54,78$
• C. $44,58$
• D. $85,100$

Answer 1

The correct option is A $44,68$

In Davisson-Germer experiment, maximum intensity of diffracted electron beam was found at different angles by varying the applied voltage to the electron gun from $44V$ to $68V$. The highest intensity was observed at an angle $\varphi ={50}^o$ with a voltage of $54V$, giving the electron a kinetic energy of $54eV$.