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ProPatto16
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Homework Statement
show that minimum thickness of quarter wave plate is d=[itex]\lambda[/itex]0/4(n1-n2
Homework Equations
[itex]\lambda[/itex]1=[itex]\lambda[/itex]0/n1
[itex]\lambda[/itex]2=[itex]\lambda[/itex]0/n2
The Attempt at a Solution
for quater wave plates wavelengths must differ by 1/4
i can see its simple but i just can't see what i do