PADI Divemaster Certification Practice Exam

How does the change in light direction affect a diver's perception?

1. Objects appear farther away

2. Objects appear closer

3. Shapes become distorted

4. Colors become muted

The correct answer is: Objects appear closer

The perception of objects underwater can significantly be influenced by the direction of light. When light enters the water at various angles, it can create optical effects that alter how divers perceive distance. When light comes from above or at an angle, it reduces the amount of light reflected back to the diver from objects below, which may lead to the perception that these objects are closer than they actually are. This phenomenon occurs because the light ray's path can create a kind of lensing effect, making nearby objects seem larger or more prominent while giving the illusion of depth for more distant objects. Understanding the effect of light direction can help divers adjust their expectations and navigation skills when underwater, ensuring a better awareness of their surroundings, making choice B the most correct in this context.