Question

What is the energy of a proton of wavelength 0.4Å?

• A. 0.51 eV
• B. 1.51 eV
• C. 10.51eV
• D. 100.51 eV

Answer 1

Answer: (A)

0.51 eV

Answer 2

$\frac { 0.287 \AA } { \sqrt { V } }$ = 0.4Å

V = 0.51 volt

E = 0.51 eV