OnlineCBT
Chemistry · Structure of atom
हिन्दीCalculate the wavelength of an electron with kinetic energy \( 3.0 \times 10^{-25} \text{ J} \). (Mass of electron \( = 9.1 \times 10^{-31} \text{ kg} \))
Correct answer · Option 3
\( 8.96 \times 10^{-7} \text{ m} \)
Explanation
Using \( \lambda = \frac{h}{\sqrt{2mK}} \), substituting values gives \( \lambda = \frac{6.626 \times 10^{-34}}{\sqrt{2 \times 9.1 \times 10^{-31} \times 3.0 \times 10^{-25}}} = 8.96 \times 10^{-7} \text{ m} \).
