JIPMER 2019 Evening Papers Online Practice

(2)

For TIR sinC =

1

µ

90 – θ ‌1 > C
sin (90 – θ‌1) > sin C
cos θ‌1 > sin C
cosθ‌1 =

1

µ

cosθ‌1 >

1

2∕√3

cosθ‌1 >

√3

2

θ‌1 > 30
Snail's law on 1st face.
n‌1sinθ = n‌2 sin θ‌1
1sinθ =

2

√3

sin θ‌1
1sinθ =

2

√3

sin30°
sinθ =

1

√3

θ = sin‌−1 (

1

√3

)