The application of real and apparent depth relates to understanding actual distance versus perceived distance, particularly in transparent mediums like water.
The concepts of real depth and apparent depth are crucial for different applications, especially when light travels from one medium to another, like from water to air. The difference arises because light rays bend (refract) when they cross the boundary between these media.
Real Depth Application
Based on the provided information, real depth is a significantly useful measure for divers. Its primary application in this context is that it directly corresponds to how deep you can dive without experiencing increasing pressure on your body. Understanding the real depth is vital for diver safety and managing physiological effects related to water pressure.
Apparent Depth Characteristic
In contrast, apparent depth is what an observer sees when looking at water from above. The key characteristic and practical implication here is that the apparent depth does not correspond with the real depth. Objects underwater appear shallower than they actually are. This visual perception is an effect of light refraction but does not represent the true distance from the surface to the object. While not a direct "application" in the sense of a tool or measure for action like real depth is for divers, its characteristic of not representing real depth is important for understanding visual distortions in water.
