Question

the wavelength of the electron is numarically equal to the distance traveled it by 1 sec then​

Answer 1

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$\pmb{Wavelength = λ}$

$\pmb{Distance \: traveled \: in \: 1 \: sec = v \times 1 = v = λ}$

$\pmb{λ = h / mv = h / mL}$

$\pmb{λ^2 = h/m}$

$\pmb{λ = \sqrt{ \frac{h}{v} } }$