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Question

The wavelength of the radiation emitted, when in a hydrogen atom electron falls from infinity to stationary state, would be: [Rydberg constant =1.097×107 m1]

A
406 nm
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B
192 nm
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C
9.1×104 nm
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D
91 nm
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Solution

The correct option is D 91 nm
1λ=RH[1n211n22]

1λ=RH[11212]

λ=1RH

λ=11.097×107 m

λ=9.1×108m

λ=91×109 m

λ=91 nm
Hence, option A is correct.

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