Question

The value of de Broglie wavelength of an electron moving with a speed of 6.6 × 10⁵ms^–1 is approximately –

• A. 11 Å
• B. 111 Å
• C. 211Å
• D. 311 Å

Answer 1

Answer: (A)

11 Å

Answer 2

l = $\frac{h}{mv}$l = $\frac{6.6 \times 10^{–34}}{9.1 \times 10^{–31} \times 6.6 \times 10^{5}}$

l = 11 Å