A diver at a depth 12 m inside water (a μω = 4/3) sees the sky in a cone of semi- vertical angle

(i) sin -1 4/3

(ii) tan -1 4/3

(iii) sin -1 3/4

(iv) 90°


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Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 14 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.