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An electron jumps from an outer orbit to...

An electron jumps from an outer orbit to an inner orbit with the energy difference of 3.0 eV. What will be the wvelength of the line and in what region does the emission take place?

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The correct Answer is:
`lamda-4140"Ã…; viible region"`
`1eV=1.6xx10^(-12)erg`
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