Earwigs eat aphids and several other harmful pests as well as hosta leaves. Some gardeners put up with the damage and leave the earwigs in the garden to control other pests. You can control earwigs with traps. Place a piece of crumpled paper under a flowerpot or use a tube of paper or bamboo as a trap.
In optics, refraction is a phenomenon that often occurs when waves travel from a medium with a given refractive index to a medium with another at an oblique angle. At the boundary between the media, the wave's phase velocity is altered, usually causing a change in direction.
Refraction (optics). Refraction is the phenomenon that causes a light ray to bend when it hits an optical lens surface (or other medium that can act to transmit light e.g. water). Refraction occurs when light strikes the surface of the new medium.As the light enters a dense medium is slows the light wave down.The light is passing from an optical medium (like air) to another optical medium (like glass).As the density of the medium changes the light striking the surface is refracted. The refraction is most obvious when when the light strikes the new medium at an angle.he light is passing from an optical medium (like air) to another optical medium (like glass). As the density of the medium changes the light striking the surface is refracted. The refraction is most obvious when when the light strikes the new medium at an angle.