| A | B |
|---|
| Pitch | the perceived highness or lowness of a sound, depemding on the frequency of sound |
| Infrasound | Any sound consisting of waves with frequencies lower than 20 hertz |
| Ultrasound | Any wave consisting of waves with frequencies higher than 20,000 hertz |
| Resonance | An effect in which the vibration of one object causes the vibration of another object at a natural frequency |
| Sonar | A system that uses reflected sound waves to determine the distance to, and location of objects |
| Photon | A particle of light |
| Intensity | The rate at which light of any other form of energy flows through a given area of space |
| Radar | A system that uses reflected radio waves to determine the distance to, and location of, objects |
| Light Ray | a model of light that represents light traveling through space in an imaginary straight line |
| Virtual Image | An image that forms at a point from which light rays appear to come but do not actually come |
| Real Image | An image of an object formed by many light rays coming together in a specific location |
| Total Internal reflection | The complete ref;ection of light at the boundary between two transparent mediums when the angle of incidence exceeds the critical angle |
| Lens | A transparent object that refracts light rays, causing them to converge or diverge to create an image |
| Magnification | A change in the size of an image compared with the size of an object |
| Prism | A transparent block with triangular cross section |
| Dispersion | An effect in which white light seperates into its component colors |
