JEE Main & Advanced
Physics
Ray Optics
Question Bank
Numerical Value Type Questions - Refraction at Plane Surface
question_answer
When the surface of the lake is calm, a fish, submerged in water will see the entire outside world within an inverted cone whose apex is situated at the eye of the fish and what angle (in degree) cone subtends at eye of fish : \[\left( \mu w=4/3 \right)\]