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Taking the wavelength of first Balmer line in hydrogen spectrum (n = 3 to n = 2) as 660 nm, the wavelength of the 2nd Balmer line (n = 4 to n = 2) will be :
A
889.2 nm
B
642.7 nm
C
488.9 nm
D
388.9 nm
Total Response
IIT Entrance Class 12 (PCM)
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