Question

A particle having a mass of $1.0mg$ has a velocity of $3600km/h$. Calculate the wavelength of the particle:
$(h=6.626\times {10}^{-27}erg-sec)$

• 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)

$6.626\times {10}^{-29}cm$

$\lambda =\frac{h}{mv}$

Here,

$v=3600km/h={10}^{5}cm/s;m=1.0;mg={10}^{-3}g$

$\lambda =\frac{6.626\times {10}^{-27}}{{10}^{-3}\times {10}^5}=6.626\times {10}^{-29}cm$

Hence, option B is correct.