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in Physics by (24.9k points)
यंग के द्वि- स्लिट प्रयोग में फ्रिन्ज –चौडाई 0.4 मिमी है। यादि पूरे उपकरण को `4//3` अपवर्तनाक वाले द्रव में डुबा दे तो नई फ्रिन्ज – चौडाई हो जायेगी:
A. `0.3 ` सेमी
B. `0.4` ‌मिमी
C. `0.53` मिमी
D. `450`माइक्रोन।

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