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Bohrs Derivations

The number of...

Question

The number of waves in the fourth Bohr orbit of hydrogen is .

A

9

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B

3

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C

4

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Solution

The correct option is C 4

Number of waves = CircumferenceWavelength
2πrλ = 2πrhmv = 2πh(mvr) = 2πh × nh2π=2πh × 4h2π
∴ n = 4

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