Question

The ratio of the De Broglie wavelengths of a proton and $\alpha$-particles will be $1:2$ if their:

• A. velocity are in the ratio $1:8$
• B. velocity are in the ratio $8:1$
• C. kinetic energy are in the ratio $1:64$
• D. kinetic energy are in the ratio $16:1$

Answer 1

Answer: (B), (D)

The correct options are
B velocity are in the ratio $8:1$
D kinetic energy are in the ratio $16:1$