The de Broglie wavelength of an electron in the 4th Bohr orbit is:
A
6πa0
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B
4πa0
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C
2πa0
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D
8πa0
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Solution
The correct option is D8πa0 de Broglie wavelength (λ) 2πr=nλ n is integer r raduis of orbit Z is atomic number n=4& r=a0n2Z2πa0n2z=nλ 2π42a11=4λ λ=8πa0