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# Light

Intensity The rate at which energy flows through a unit area perpendicular to the direction of wave motion. For light it is the brightness.
Angle of Incidence The angle between an incoming ray and a line that is normal to the striking surface.
Polarization Waves in which the direction of vibration is the same for all waves.
Dispersion The process of using a prism to separate light into its component wavelengths.
Electromagnetic Spectrum The complete range of electromagnetic radiation.
Specular Reflection The bouncing back of a light ray off of a smooth surface.
Focal length The distance between the focal point and the lens or mirror.
Diffuse Reflection The bouncing back of a light ray off of a rough surface.
Focal Point The point where light rays meet after reflecting off of a curved mirror or refracting through a lens.
Lens A transparent object that refracts light rays, causing them to converge or diverge, to create an image.
Diffraction The spreading of waves into a region behind an obstruction.
Object distance (do) The distance between an object and a lens or mirror.
Refraction The bending of a wave as it passes at an angle from one medium to another.
Real Image An image formed where light rays that have been reflected or refracted, converge.
Virtual Image An image formed where light rays that have been reflected or refracted, appear to converge only.
Concave A surface that is curving inward.
Convex A surface that is curving outward.
Ray diagram A model used to predict image formation.
Created by: stamback

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