Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
8th Unit 3
Energy: Sound & Light Key Terms
| Term | Definition |
|---|---|
| Acoustics | The science of sound: Study of the interaction between sound waves and objects |
| Amplification | Producing sounds that have more intensity than where they were originally produced |
| Compression | Moving molecules closer together as in a gas |
| Compression wave (longitudinal wave) | A wave produced where molecules are pushed closer together and then rebound to their normal position |
| Crest | The highest point of a transverse wave |
| Density | The ratio of mass versus volume: D= m/V |
| Doppler Effect | When sound waves of an object moving relative to the observer take on a different frequency than if they were stationary. |
| Frequency | The number of waves that pass a given point in a given amount of time. |
| Inner ear | Inner most part of the ear that contains the cochlea and nerve endings |
| Intensity | The loudness of sound |
| Mach I | An object reaches this point when it breaks the sound barrier |
| Medium | A substance that sound can travel through |
| Middle ear | The part of the ear that contains the ossicles (ear bones) |
| Outer ear | The part of the ear that receives sound input from the outside world |
| P wave | Primary compression wave that occurs during an earthquake |
| Pitch | The high or low effect of sound based on frequency |
| Rarefaction | The decompression of a compression wave |
| S wave | The transverse wave associated with an Earthquake |
| Seismograph | An instrument that records seismic waves |
| Sonic Boom | The release of a massive sound wave that occurs when an object breaks the sound barrier |
| Sound barrier | The point at which an object exceeds the speed of sound |
| Sound wave | A compression wave that carries energy to a natural or artificial device that can detect pressure changes |
| Speed of sound | 343.2 meters per second or 1,126 ft/s. This is equivalent to 1,236 kilometers per hour or 768 mph |
| Supersonic | An object that can break the sound barrier |
| Tinnitus | Ringing or hissing in the ear as a result of listening to high frequency or high intensity sounds |
| Trough | The lowest part of a transverse wave |
| Transverse wave | A wave that moves energy in one direction but travels in a path that oscillates up and down in equal directions |
| Wavelength | The distance between two crests in a transverse wave or the distance between the compressions of a compression wave. |
| Angle of incidence | The angle at which light hits a reflective surface |
| Angle of reflection | The angle at which light leaves a reflective surface |
| Diffraction | The apparent bending of waves around small obstacles and the spreading out of waves past small openings |
| Electromagnetic radiation | Energy that moves as both a particle and a wave that can travel through any medium |
| Electromagnetic spectrum | The range of all possible wavelengths of electromagnetic radiation |
| Fiber optics | Optical fibers that can carry light over long distances that are used in communication and data transfer |
| LASER | Light Amplification by Stimulated Emission of Radiation |
| Lens | An optical device which transmits and refracts light, converging or diverging the beam. |
| Mirror | A substance that can reflect light efficiently |
| Photon | A bundle of light energy that moves as both a particle and a wave |
| Primary colors | Colors that can be added or subtracted from one another to create other colors. Red, Blue, Green, Cyan, Magenta and Yellow. |
| Prism | A substance that can refract white light separating it into its colored components |
| Reflection | The change in direction of a wave from the surface of a reflective material. |
| Refraction | The bending of a wave when it enters a medium where it's speed changes due to differences in density. |
| Speed of light | The speed at which light travels in a vacuum. (3.00 x 108 m/s) |
| Wave particle duality | Explains the wave and particle characteristics that light exhibits. |
| Decibel | Unit of sound intensity |
Created by:
darrin_evans
Popular Physical Science sets