Assertion (A) : Second orbit circumference of hydrogen atom is two times the de-Broglie wavelength of electrons in that orbit.
Reason (R) : de-Broglie wavelength of electron in ground state is minimum.
Answer & explanation
Correct answer: option 1
mv2r2 = 2(h/2π)
2πr2 = 2(h/mv2) = 2λ2
λ = h/p