If Young's double slit experiment is performed in water instead of air, then
Fringe width would increase
Fringe width would decrease
Fringe width would remain unchanged
No fringes would be seen
A
No fringes would be seen
B
Fringe width would increase
C
Fringe width would remain unchanged
D
Fringe width would decrease
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Solution
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In water, speed of light decreases.
Since frequency remains same, therefore the wavelength must decrease.
The formula for fringe width is λDd.
Thus, fringe width decreases in water because wavelength of light decreases.
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