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In Young's double slit experiment, the fringe width is found to be 0.4 mm. If the whole apparatus is immersed in water of refractive index (4/3), without disturbing the geometrical arrangement, what is the new fringe width?
  1. 0.3 mm
  2. 0.4 mm
  3. 1.33 mm
  4. 0.5 mm

A
1.33 mm
B
0.4 mm
C
0.5 mm
D
0.3 mm
Solution
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