When a ray is refracted from one medium into another, the wavelegths changes from `6000Å` to `4000Å`. The critical angle for a ray from the second medium will beA. `cos^(-1)(2/3)`B. `sin^(-1)(2/sqrt3)`C. `sin^(-1)(2/sqrt3)`D. `cos^(-1)(2/sqrt3)`

When a ray is refracted from one medium into another, the wavelegths c

1.	When a ray is refracted from one medium into another, the wavelegths changes from `6000Å` to `4000Å`. The critical angle for a ray from the second medium will beA. `cos^(-1)(2/3)`B. `sin^(-1)(2/sqrt3)`C. `sin^(-1)(2/sqrt3)`D. `cos^(-1)(2/sqrt3)`
Answer» Correct Answer - C (c ) As `""_(1)mu_(2)=1/sinC` `rArr mu_(2)/mu_(1)=lamda_(1)/lamda_(2)=1/sinC` `rArr 6000/4000=1/sin C` `rArr` Criticle angle, `C=sin^(-1)(2/3)`

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When a ray is refracted from one medium into another, the wavelegths changes from `6000Å` to `4000Å`. The critical angle for a ray from the second medium will beA. `cos^(-1)(2/3)`B. `sin^(-1)(2/sqrt3)`C. `sin^(-1)(2/sqrt3)`D. `cos^(-1)(2/sqrt3)`

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