| A | B |
|---|
| Electromagnetic waves | transverse wave consisting of changing electric and changing magnetic fields |
| Photons | positively subatomic particle found in the nucleus |
| Intensity | the rate at which wave energy flow through a given unit of area |
| Electromagnetic spectrum | the full range of electromagnetic radiation |
| Transparent | a description of a material that allows most of the light that strikes it to pass through |
| Translucent | a description of a material that scatters light that passes through it |
| Opaque | a description of a material that either absorbs or reflects all of the light that strikes it so nothing can be seen through it |
| Reflection | the interaction that occurs when a waves bounces off a surface that it cannot pass through |
| Polarized light | a type of light including light with waves that vibrate in only one plane |
| Laser | a device that generates a beam of coherent light |
| Amplitude | the maximum displacement of a medium from the rest position |
| Compression | an area of a longitudinal wave where the particles of the medium are close together |
| Crest | highest point of a transverse wave |
| Doppler Effect | a change in sound frequency caused by motion of the sound source, motion of the listener, or both |
| Frequency | the number of complete cycles per unit time for a periodic motion |
| Intensity | the rate at which a wave’s energy flows through a given unit of area |
| Longitudinal wave | a wave in which the vibration of the medium is parallel to the direction the wave travels |
| Pitch | the frequency of a sound as a listener perceives it |
| Rarefaction | an area of a longitudinal wave where the particles of the medium are spread out |
| Sound wave | longitudinal wave consisting of compressions and rarefactions, which travels through a medium |
| Surface wave | a wave that travels along a surface separating two mediums |
| Transverse wave | a wave that causes a medium to vibrate at right angles to the direction in which the wave travels |
| Trough | lowest point of a transverse wave |
| Wavelength | distance between a point on a wave and the same point on the next cycle of the wave |
