Refraction

According to Merriam-Webster, refraction is a deflection from a straight path undergone by a light ray or energy wave in passing obliquely from one medium (such as air) into another (such as glass) in which its velocity is different.

During a lab, students were able to see for themselves a phenonemon that makes an object seem to disappear, but it reality, it is just an effect of refraction. Students were to view the object placed under the empty cup first, then water was poured into the cup (that’s when the object “disappeared”) and suddenly the object “disappeared.” This was due to the scientific principle of refraction.

The root of refraction is seen in the notion that the path of a ray of light or wave of energy is "broken" when it is deflected or turned. The effects of refraction can be seen in a rainbow, which is formed when light rays passing into (and reflecting out of) water droplets are bent at different angles depending on their color, so that the light separates into bands of color. The amount of refraction depends on the angle and the type of matter; refraction can occur even when passing through different kinds of air. A mirage, such as you might see in the desert or over a patch of asphalt in the summer, occurs when light passing through warm air meets the very hot air near the surface; reflecting the sky, it often resembles a lake.