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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. What will be the angular width of the fringe if the entire experimental apparatus is immersed in water ? take refractive index of water to be (4)/(3). |
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Answer» SOLUTION :Here angular fringe width in air `alpha_(air)=0.2^(@)` and refractive index of water `n_(W)=(4)/(3)` `THEREFORE` Angular fringe width in water `alpha_(water)=(alpha_(air))/(n_(w))=(0.2^(@))/(4//3)=0.15^(@)`. |
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