Question

light coming out of a point source kept at depth h under water (u) has only a part of it that escapes into air . what is the radius of the circle through which light ray escapes ​

Answer 1

…,..???!₹3&8;&;4!;,&,8,!3&,,8₹!3?;&,,8:₹?3&:.&,8;₹:!:!:₹,,&:8v. Vvv
Than