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Determine the linear momentum of the electron in the second Bohr orbit in a hydrogen atom. Hence determine the linear momentum in the third Bohr orbit.

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The linear speed of the electron in the nth Bohr orbit,

vn \(\cfrac{e^2}{2ε_0nh}\)

∴ The linear momentum of the electron in the second orbit,

P2 = mev2\(\cfrac{m_e\,e^2}{4ε_0h}\)

Since vn \(\propto\) 1/n,

pn \(\propto\) 1/n

∴ The linear momentum of the electron in the third orbit,

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