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Chemistry · Structure of atom
हिन्दीCalculate the de Broglie wavelength associated with an electron in the Bohr's first orbit whose velocity is \( 2.19 \times 10^6 \text{ m s}^{-1} \).
Correct answer · Option 2
\( 3.32 \times 10^{-10} \text{ m} \)
Explanation
Using \( \lambda = \frac{h}{mv} = \frac{6.626 \times 10^{-34}}{9.1 \times 10^{-31} \times 2.19 \times 10^6} = 3.32 \times 10^{-10} \text{ m} \) (equal to circumference of first Bohr orbit).
