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In a double slit experiment, when light of wavelength 400 nm was used, the angular width of the first minima formed at a screen placed 1 m away, was found to be 0.2°. What will be the angular width of the first minima, if the entire experimental apparatus is immersed in water ?

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0.05º

0.1º

0.266°

0.15°

answer is D.

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Detailed Solution

{\text{in medium }}\theta {\text{ becomes}}\frac{\theta }{\mu }\

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