Question

A ball of mass m travelling with a certain velocity has a kinetic energy K. Then the de-Broglie wavelength associated with the ball is

• A. $\frac{h}{\sqrt{2mK}}$
• B. $\sqrt{\frac{h}{2mK}}$
• C. $\frac{h}{2mK}$
• D. None of these

Answer 1

Answer: (A)

$\frac{h}{\sqrt{2mK}}$

Answer 2

l = $\frac{h}{p}$ = $\frac{h}{\sqrt{2mE}}$ = $\frac{h}{\sqrt{2mK}}$