In a double slit experiment the angular width of a fringe is found to be 0.2° on a screen…
Physics · Class 12 · CBSE — Wave Optics
In a double slit experiment the angular width of a fringe is found to be 0.2° on a screen placed 1 m away. The wavelength of light used is 600 nm. The angular width of the fringe if entire experimental apparatus is immersed in water is 
- 0.15°
- 1°
- 2°
- 0.3°
Answer
(A) 0.15°
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