Question

The value of de Broglie wavelength of an electron moving with a speed of $6.6\times {10}^{5}m{s}^{-1}$ is approximately

• A. 11 $A^0$
• B. 111$A^0$
• C. 211 $A^0$
• D. 311 $A^0$

Answer 1

Answer: (A)

11 $A^0$

$\lambda =\frac{h}{m\nu }$

$=\frac{6.6\times {10}^{-34}}{9.1\times {10}^{-31}\times 6.6\times {10}^5}$

$=11A^{\circ }$

So, the answer is option (A).