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QNEET-2017-Ph-988: NEET 2017 Physics - Class 12 NEET-2017-Ph-988 Solution: The ratio of wavelengths of the last line of Balmer series and…
The ratio of wavelengths of the last line of Balmer series and the last line of Lyman series is 1 4 0.5 2
Multiple Choice Options
- A 1
- B 4
- C 0.5
- D 2
Step-by-Step Verified Solution
In case of Balmer series :
n 1 = � , n 2 = 2
_ 1 _ B = R c ( 1 2 2 _ 1 � 2 ) = R c 4
In case of Lyman series :
n 1 = � , n 2 = 1
_ 1 _ L = R c ( 1 1 2 _ 1 � 2 ) = Rc
_ _ B _ L = 4 1 = 4