If mu(O) and mu(E ) be the refractive in...

If `mu_(O) and mu_(E )` be the refractive indices of the crystal for O-ray and E-ray respectively, then which of the following relations is correct for negative crystal

`mu_(E) = mu_(O)`

`mu_(E) gt mu_(O)`

`mu_(E) lt mu_(O)`

`mu_(E) ge mu_(O)`

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