During spear fishing a fisherman aims at the:(a) head of fish(b) slightly ahead of the head of fish(c) tail of fish(d) none of these

Analyzing the Problem

When a fisherman engages in spear fishing, he must consider the physics involved in the act of aiming. The primary factors affecting where to aim include the speed of the fish, the speed of the spear, and the refraction of light in water.

Relevant Concepts

The light refraction phenomenon indicates that due to the differences in the density of water and air, the visual perception of where the fish actually is differs from its true position under water. This means that the fisherman must account for the time it takes for the spear to travel and the movement speed of the fish.

Conclusion

When aiming at a fish, a fisherman commonly aims slightly ahead of the head of the fish to compensate for these factors. This technique increases the likelihood of hitting the fish by accounting for its movement and the time delay of the spear reaching the target.

Final Answer

(b) slightly ahead of the head of fish