Q. De-Broglie wavelength of a body of mass $1\ kg$ moving with velocity of $2000\ m/s$ is
A) $3.32 \times 10^{- 27}\mathring{\mathrm{A}}$
B) $1.5 \times 10^{7}\mathring{\mathrm{A}}$
C) $0.55 \times 10^{- 22}\mathring{\mathrm{A}}$
D) None of these
Explanation
(a) $\lambda = \frac{h}{mv} = \frac{6.6 \times 10^{- 34}}{1 \times 2000} = 3.3 \times 10^{- 37}m = 3.3 \times 10^{- 27}\mathring{\mathrm{A}}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.