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A small wooden rod of length 5mm is fixe...

A small wooden rod of length `5mm` is fixed at the bottom of the container filled with water `(mu_(water)=4/3)`. It is making an angle `37^(@)` with vertical. If an observer (in air) observes the rod paraxially, and the rod is appearing at an angle `(pi)/x` radian with vertical then the find the value of `x`.

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