A glass prism is immeresed in water as s...

A glass prism is immeresed in water as shown in the figure. When a beam of light incident is incident normally on the face ab, it is internally reflected at the face ad. If the refractive index of glass is 1.5 and that of water is `4//3`, then

`sin theta lt (2//3)`

`sin theta gt (8//9)`

`(2//3) lt sin theta lt (8//9)`

None of these

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