Question | Answer |
Wave | A disturbance that transfers energy from place to place |
Energy | The ability to do work. |
Medium | A material through which a wave travels. |
Mechanical Wave | A wave that only travels through a medium. |
vibration | A repeated back and forth or up and down movement. |
Transverse Wave | Waves that move a right angles of the rest line. |
Crest | The high part of a transverse wave. |
Trough | The low part of a transverse wave. |
Longitudinal Wave | A wave in which the medium moves parrallel to the rest line. |
Compression | The part of a longitudinal wave when the molecules are close together. |
Rarefaction | The part of a longitudinal wave when the molecules ar far apart. |
Amplitude | The distance from the rest line a crest or trough goes. |
Wavelength | The distance between to corresponding parts of the wave. |
Frequency | The number of time a wave passes in a given number of seconds. |
Hertz | The amount of wavelenghts that pass in one second. |
Reflection | When a object or wave hits a surface where it cannot pass through, but come back |
Law of Reflection | The angle of incidence= the angle of reflection |
Refraction | The bending of waves due to change in speed. |
Diffration | When a wave bends around or through a barrier and spreads out. |
Interference | The interaction between two waves that meet. |
Constructive Interference | When two waves combine to make a higher amplitude. |
Destructive Interference | When two waves combine to make a smaller amplitude. |
Standing Wave | A wave that appears to stand in one place when it is two waves passing each other. |
Node | Points of zero amplitude on a node. |
Antinode | The points of maximum amplitude on a node. |
Resonance | An increase in the amplitude of vibration that occurs when external frequencies match the natural frequency. |
Echo | Sound Waves that reflect when they hit a surface. |
Elasticity | The ability of an object to bounce back after being disturbed. |
Density | The amount of matter, or mass in a given space, or volume. |
Loudness | The perception of energy in a sound. |
Intensity | The amount of energy a sound carries per second through a unit area. |
Decibel | The unit for measuring loudness |
Pitch | The sound how high or low a person percieves of the sound. |
Ultrasound | Sound waves that have frequincies above the range of the human ear. |
Infrasound | Sound waves that have frequencies below the range of the human ea |
Larynx | The part of the throat that produces noise. |
Doppler Effect | The change in frequencies due to the postion of the observer. |
Music | A set of notes that when combined are pleasing. |
Fundamental Tone | The lowest natural frequency of an object. |
Overtone | The object's higher natural frquency of an object. |
Acoustics | The study of how sound reacts with the enviornment. |
Reverberation | The echoes of a sound of heard after the sound of the source stops. |
Ear Canal | Collects sound waves. |
Eardrum | A drumlike membrane that vibrates when it hears sound waves. |
Cochlea | A fluid cavity shaped like a conch shell. |
Echolocation | The reflection of sound waves to determine the distance of objects. |
Sonar | Using sound waves the create a picture of objects. |
Sonogram | Using ultrasound to make a picture. |
Formula for Frequency | frequency=speed - wavelength |
Formula for Wavelenght | Wavelenght= speed ----- frequency |
Formula for Speed | Speed=Frequency x wavelength |