Question

Find the de-Broglie wavelength for a $100gm$ bullet moving at $900m/s$ .

• A. $3.7\times 10^{-35}m$
• B. $7.4\times 10^{-36}m$
• C. $7.8\times 10^{-37}m$
• D. $8.2\times 10^{-39}m$

Answer 1

Answer: (B)

de-Broglie wavelength
$\lambda =\frac{h}{mv}=\frac{6.6\times 10^{-34}}{0.1\times 900}$
$=7.3\times 10^{-36}m$