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The emission spectrum of hydrogen atoms ...

The emission spectrum of hydrogen atoms has two has two lines of Balmer series with wavelength `4102Å`and `4861Å`. To what series does a spectral line belong if its wave nmnber is equal to the difference of wave number is of above two lines ? What is the wavelength of this line? `[TakeR=1.097xx10^(7)m^(-1)]`

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PHYSICS GALAXY - ASHISH ARORA-ATOMIC PHYSICS-Unsolved Numerical Problems
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