Light wave enters from medium 1 to medium 2. Its velocity in `2^(nd)` medium is double from `1^(st)`. For total internal reflection the angle of incidence must be greater thanA. `30^(@)`B. `60^(@)`C. `45^(@)`D. `90^(@)`

Light wave enters from medium 1 to medium 2. Its velocity in `2^(nd)`

1.	Light wave enters from medium 1 to medium 2. Its velocity in `2^(nd)` medium is double from `1^(st)`. For total internal reflection the angle of incidence must be greater thanA. `30^(@)`B. `60^(@)`C. `45^(@)`D. `90^(@)`
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Light wave enters from medium 1 to medium 2. Its velocity in `2^(nd)` medium is double from `1^(st)`. For total internal reflection the angle of incidence must be greater thanA. `30^(@)`B. `60^(@)`C. `45^(@)`D. `90^(@)`

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