Question
Question: If velocity of light in air is 3 × 0<sup>8</sup> m/s and that in water is 2 × 10<sup>8</sup> m/s, th...
If velocity of light in air is 3 × 08 m/s and that in water is 2 × 108 m/s, then what would be the critical angle –
A
sin–1 (3/2)
B
tan–1 (3/2)
C
tan–1 (2/3)
D
sin–1 (2/3)
Answer
sin–1 (2/3)
Explanation
Solution
sin ic = =
= 32
\ ic = sin–1 (2/3)