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The sodium yellow doubled has wavelength...

The sodium yellow doubled has wavelength 5890 Å and `lamda` Å`(lamda gt gt 5890"Å")` and resolving power of a grating to resolve these lines is 982, then value of `lamda` is

A

5896 Å

B

5880 Å

C

5869 Å

D

5876 Å

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The correct Answer is:
A
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