OnlineCBT
Chemistry · Structure of atom
हिन्दीCalculate the de Broglie wavelength of an electron moving with a velocity of \( 2.05 \times 10^7 \text{ m s}^{-1} \). (Mass of electron \( = 9.1 \times 10^{-31} \text{ kg} \))
Correct answer · Option 3
\( 3.55 \times 10^{-11} \text{ m} \)
Explanation
Using de Broglie formula \( \lambda = \frac{h}{mv} = \frac{6.626 \times 10^{-34}}{9.1 \times 10^{-31} \times 2.05 \times 10^7} = 3.55 \times 10^{-11} \text{ m} \).
