Intensity observed in an interference pattern is \( I=I_{0} \sin ^{2} \theta \). At \( \theta=30...

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Intensity observed in an interference pattern is \( I=I_{0} \sin ^{2} \theta \). At \( \theta=30^{\circ} \), intensity \( I=5 \pm 0.002 \). The percentage error in angle is
(1) \( 4 \sqrt{3} \times 10^{-2} \% \)
(2) \( \frac{4}{\pi} \times 10^{-2} \% \)
\( P \)
W.
(3) \( \frac{4 \sqrt{3}}{\pi} \times 10^{-2} \% \)
(4) \( \sqrt{3} \times 10^{-2} \% \)
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