Find the value of E if the wavelengths of different lines are given as 63m and 5

Question

Find the value of E if the wavelengths of different lines are given as 63m and 54m, having weights 6 and 7 respectively.

Options:

A . 8.27

B . 2.87

C . 2.78

D . 7.28

Answer: Option C
Answer: (c).2.78

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