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The interference fringes for sodium ligh...

The interference fringes for sodium light `(lambda = 5890 Å)` in a double slit experiment have an angular width of `0.2^(@)`. For what wavelength will width be `10%` greater.

A

`5892Å`

B

`4000Å`

C

`8000Å`

D

`6479Å`

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The correct Answer is:
A
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