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s8P4.a
for mrs.finley
| Term | Definition |
|---|---|
| wave | a periodic disturbance in a solid, liquid, or gas as energy is transmitted through a medium |
| medium | a physical environment in which phenomena occur |
| mechanical wave | a wave that needs a medium in which to travel |
| transverse wave | a wave in which the particles of the medium move perpendicularly to the direction the wave is traveling |
| longitudinal wave | a wave in which the particles of the medium vibrate parallel to the direction of wave motion |
| compression | part of the longitudinal wave where the particles bunch up closer together |
| rarefraction | part of the longitudinal wave in which the particles expand and move apart |
| electromagnetic wave | a wave that consists of electric and magnetic fields that vibrate at right angles to each other |
| reflection | the bouncing back of ray of light,sound, or heat when the ray hits a surface that does not go through |
| refraction | the bending of a wave as the wave passes between the two substances in which the speed of the wave differs |
| diffraction | a change in the direction of a wave when the wave finds a obstacle or an edge, such as an openeing |
| transmission | the passing of light or other form of energy through matter |
| absorption | in optics, the transfer of light energy to particles of matter |
| cornea | transparent layers of the front of the eye; cover both the iris and the pupil; also helps refract light |
| pupil | a hole that controls the amount of light that enters the eye by adjusting in size |
| iris | the part of the eye that adjusts the size of the pupil; provides characteristics eye color |
| lens | a transparent object that refracts light waves such that they converge or diverge create an image |
| convex lens | a lens that is thicker in the middle than at the edges |
| retina | structure at the back of the eye upon which the lens forms an image |
| optic lens | eye structure that transmits information about an image formed on the retina to the brain |
| electromagnetic spectrum | all of the frequencies or wavelength radiation |
| radio waves | electromagnetic waves that have longest wavelength, lowest frequency, and least amount of energy |
| microwaves | electromagnetic waves that have shorter wavelengths, higher frequencies, and more energy than radio waves |
| infrared light | light on the electromagnetic spectrum, light with wavelength that fall between visible light and microwave |
| ultraviolet light | a narrow section of the electromagnetic spectrum that the human eye can detect |
| x-rays | electromagnetic radiation having wavelengths that fall between visible light and x-rays |
| gamma rays | electromagnetics waves with short wavelengths, high frequencies and high energy that can travel through soft tissue |
| dio waves | the shortest electromagnetic wave that have the highest frequencies and highest energy |
Created by:
Sugarboo27
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