A very thin sheet of plastic (n=1.55) covers one slit of a
double-slit apparatus illuminated by 640 nm light. The center point
on the screen, instead of being a maximum, is dark. What is
the (minimum) thickness of the plastic?
A very thin sheet of plastic (n=1.55) covers one slit of a double-slit apparatus illuminated by 640 nm light. The center
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