Chapter 26 - Geometrical Optics - Problems and Conceptual Exercises - Page 941: 45

(a) point 1 (b) point 4

(a) We know that if the ray from the head toward the fish is extended without any bending, then it goes along direction 1 and therefore, the head sees the fish along the direction of point 1. (b) We know that if the ray from the fish toward the head is extended without bending, then the fish sees the head along the direction of point 4.