| A | B |
|---|
| reflection | When a wave strikes an object or surface and bounces off |
| refraction | When a wave bends and changes speed as it moves from one medium to another |
| defraction | the bending of waves around a barrier |
| interference | two ormore waves combine and form a new wave |
| constructive interference | the crest of one wave overlaps the crest of another wave, making a larger one |
| destructive interference | the crest of one wave overlaps the trough of another wave, making a smaller wave. |
| cancel | If waves with equal amplitude meet cres to trough they _____ each other out. |
| wave | Interference can be used in _____ protection. |
| wave | a transfer of energy, in the form of a disturbance, through some medium, without translocation of the medium |
| pulse | wave having a short duration |
| periodic motion or harmonic motion. | Waves that vibrate in repeating cycles illustrate |
| cycle | One complete oscillation is called a |
| Transverse vibration | occurs when vibration of the medium is perpendicular to the direction of energy transfer. |
| crest and trough | The maximum and minimum positions on a transverse wave are called |
| Longitudinal vibration | occurs when the medium vibrates parallel to the direction of energy transfer |
| Longitudinal vibrations | consist of regions of compression and rarefaction. |
| Frequency (f) | describes the number of cycles occurring in a given unit of time. |
| hertz (Hz) | The SI unit for frequency is the |
| Frequency | = Number of cycles divided by Time Interval |
| e period (T) | the time required to complete one full cycle. |
| Wave interference occurs | when two or more waves act simultaneously on a medium. |
| Constructive interference occurs | when the resulting disturbance is larger than the individual disturbances which created it. |
| destructive interference has occurred | When the resultant displacement is smaller than the individual displacements |
| uniform medium | Waves travel at a constant speed in a |
| A change in the speed of a wave results in a corresponding change in | wavelength |
| The frequency of the wave remains constant | once the wave has been generated. |
| The amplitude of a wave | depends on the amount of energy being transmitted. |
| Diffraction is the bending that occurs | when a wave passes around the edge of an obstacle. |
| amplitude | the distance from rest position or equilibrium to the crest or trough of a wave. |
| crest | the top of a transverse wave. |
| cycle | one complete oscillation or vibration of a wave. |
| frequency | the number of oscillations or vibrations per second. |
| period | the time required to complete one cycle. |
| periodic waves | regular, repeated waves. |
| pulse | a single wave movement |
| standing wave | reflected waves from the end of a medium interfering with incident waves so that specific points appear to be standing still. |
| surface waves | a combination of transverse and longitudinal waves at the surface of water. |
| transverse waves | waves such as water or slinky waves where the particles in the medium move or vibrate perpendicular to the direction of the wave |
| trough | the bottom of a transverse wa |
| wavelength | the distance from crest to crest, trough to trough, or other equivalent distance in a wave. |
