oscillate, move to and fro about a certain position along a line, reflection, is when light bounces off an object., refraction, the change of direction of a light ray when it passes across a boundary between two transparent substances (including air), angle of incidence, angle between an incident light ray and the normal, used in refraction and reflection, angle of reflection, angle between a reflected light ray and the normal, echo, reflection of sound that can be heard, opaque, a material that does not let light pass through, luminous, objects we see because they off light, Non-luminous objects, objects we see because they reflect light, Shadow, the region behind an object where light cannot reach, waves, disturbance that travels through space or a medium, which can carry energy or information, ray, line showing the path followed by light, rarefaction, stretched apart, Law of reflection, Angle of incidence = Angle of reflection, incident ray, ray of light striking a surface, before it is reflected or refracted.

Waves

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Canvia de fonament

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