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Find the number of waves in an orbit fo ...

Find the number of waves in an orbit fo H-atom having radius equal to ` 8. 464 xx 10^(-10) m`.

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The correct Answer is:
4
` r_n =r_1 xx n^2`
` 8. 484xx 10 ^(-10) = n^2 xx 5 . 29 xx 10^(-11)`
`n^2 = 16`
` n=4` .
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