úszáshatás

Úszáshatás, also known as swimming pool effect, refers to the phenomenon where the water level in a swimming pool appears to be higher than it actually is due to the refraction of light. This optical illusion occurs because light travels at different speeds in different media. When light enters the water, it slows down and changes direction, causing the apparent position of objects, including the water surface, to shift.

The úszáshatás is most noticeable when looking at the pool from an angle, such as from the side or from above. The water's surface may appear to be curved or bent, making it seem like the water level is higher than it actually is. This effect can be particularly striking when the pool is viewed from a higher vantage point, such as from a nearby hill or a tall building.

The úszáshatás is not a physical change in the water level but rather an optical illusion caused by the refraction of light. It is a fascinating example of how our perception of the world can be influenced by the way light interacts with different materials. This phenomenon is not unique to swimming pools and can be observed in other situations where light passes from one medium to another, such as when looking at a fish in a bowl of water or when viewing objects through a glass of water.