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Difference in wavelength of two extreme ...

Difference in wavelength of two extreme lines of H-atom in Balmer region is (where `R_(H)` is Rydberg constant ):

A

`(7.2)/(R_(H))`

B

`(0.25)/(R_(H))`

C

`(4)/(R_(H))`

D

`(3.2)/(R_(H))`

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The correct Answer is:
D
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