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Perimeter

A thin slice ...

Question

A thin slice is cut out of a glass cylinder along a plane parallel to its axis. The slice is placed on a flat glass plae as shown in figure. The observed interference fringes from this combination shall be

A

straight

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B

circular

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C

equally spaced

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D

having fringe spacing which increases as we go outward

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Solution

The correct option is A straight
The locus of the equal path difference consists in lines going parallel to the axis of cylinder.
Therefore, interference fringes will be straight.

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