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Q.

 In H-atom, if 'x' is the radius of the first Bohr orbit, de Broglie wavelength of an electron in 3rd orbit is :

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a

3πx

b

6πx

c

x2

d

9x2

answer is D.

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Detailed Solution

de Broglie wavelength of an electron in 3rd orbit is calculated as,

2πr=nλ

⇒λ=2π3×x×32

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