User talk:Learner4

Light and Optics

Electromagnetic wave-A wave that consists of outgoing electric and magnetic fields, which radiate outward from the source at the speed of light.

Electromagnetic spectrum-The range of electromagnetic waves from Gamma to Radio waves.

Reflection-The change in direction of an electromagnetic wave at a surface.

Diffuse Reflection-Light that is reflected in many directions off a rough surface.

Specular Reflection-Light that is reflected in a single direction off of a polished surface.

Angle of incidence-The angle at which a beam of light hits a reflective surface.

Angle of reflection-The angle at which a beam of light is reflected off a surface.

Flat mirror-The simplest mirror. The most basic.

Virtual image-the image that appears because of a reflective surface; an image that can’t be displayed on a physical surface.

Concave mirror-Mirrors that bend in and make images bigger.

Convex mirror-Mirrors that bend outward and make things look smaller.

Real image-A real image

Additive primary colors-Red, green, and blue colors that can be combined to make white light.

Subtractive primary colors-Cyan, Magenta, and yellow colors that are combined to make black marker.

Polarization-Limiting light to beams that have a specific electric and magnetic field.

Refraction-The bending of light as it travels from one material to another.

Converging lens-Lens that are thicker in the middle than on the outside. These types of lens bend light towards the center or converge.

Diverging lens-Lens that are thinner in the middle and thicker on the outside. These types of lens bend light away from the center or diverge.

Mirage-An event made by refraction in the atmosphere.

Dispersion-Light of different wavelengths is bent at different angles when they move into a refracting material.

Interference-When light wavelengths affect each other like a wave, it is called interference.

Diffraction-When light or waves go off in a different direction when they go around a corner, hit something, or meet an edge.