Question

A particle having a mass of $1 mg$ has a velocity $1 Km /$ sec. Calculate the wavelength of the particle:

• A. $6.626 \times 10^{-28} cm$
• B. $6.626 \times 10^{-29} cm$
• C. $6.626 \times 10^{-30} cm$
• D. $6.626 \times 10^{-31} cm$

Answer 1

Answer: (B)

$\lambda=\frac{h}{m v}=\frac{6.626 \times 10^{-27}}{10^{-3} \times 10^{5}}$

$\Rightarrow \frac{6.626 \times 10^{-27}}{10^{2}}=6.626 \times 10^{-29} cm$