A light ray is incident on lower medium ...

A light ray is incident on lower medium boundary at an angle `30^(@)` with the normal. Which of following statement is/are true ?

If `mu_(2)gt2`, then total deviation is `60^(@)`

If `mu_(2)lt2`, then total deviation is `30^(@)`

If `mu_(2)gt2`, then the deviation is `120^(@)`

If `mu_(2)lt2`, then total deviation is `180^(@)`

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