Wave - rhythmic disturbances that carry energy without carrying matter, Mechanical Wave - a wave that requires a medium to transfer energy/propagate, Electromagnetic Wave - a wave that does not require a medium to transfer energy/propagate, Transverse Wave - a way in which the energy causes the matter in the medium to move up/down or back/forth at right angles (i.e. perpendicular) to the direction the wave travels, Longitudinal Wave - a wave in which the particles in the medium vibrate parallel to the direction in which the wave travels, Amplitude  - the largest distance that a wave displaces particles from their resting position; the height of the wave, Crest  - the high points on a transverse wave, Trough - the low points on a transverse wave, Wavelength  - the distance between two successive crests or troughs of a wave; represented by the variable 𝜆; measured in meters (m), Frequency  - the number of wavelengths that propagate passed a certain point in a certain amount of time; represented by the variable f; measured in Hertz (Hz), Period - the time it takes for one full wavelength to propagate passed a certain point; represented by the variable T; measured in seconds (s), Rarefaction - the places where the particles are further apart, Compression - the places where the particles are closer together, Constructive Interference  - when the waves that meet have displacements in the same direction, Destructive Interference  - when the waves that meet have displacements in the opposite direction, Reflection  - when a wave strikes a boundary and is bounced back, Refraction - when a wave strikes a boundary, passes through, and is bent in the process, Index of Refraction - The ratio of the speed of light in a vacuum to the the speed of light through a specific medium, Radio Wave  - part of the electromagnetic spectrum with the largest wavelength and least amount of energy; used in communications, Gamma Rays  - the highest energy and lowest wavelength waves on the electromagnetic spectrum; used in cancer treatment, Visible Light Spectrum  - the part of the electromagnetic spectrum that humans can see; right in the middle of the spectrum for energy and wavelength, Microwaves  - part of the electromagnetic spectrum with more energy than radio waves but less energy than infrared; used in cooking appliances and radar, Infrared  - part of the electromagnetic spectrum that has less energy than the visible light spectrum but more energy than microwaves; used in thermal imaging and remote control, X-Rays  - part of the electromagnetic spectrum; more energy than ultraviolet rays but less energy than gamma rays; used in medical imaging, Ultraviolet Rays  - part of the electromagnetic spectrum that has higher energy than the visible light spectrum but less energy than x-rays; used in curing materials and sanitization, Incident Angle  - the angle at which a wave encounters a boundary, Incident Ray - the source ray of light that encounters the boundary, Reflected Angle  - the angle that the light is reflected, Reflected Ray - the reflected light, Refracted Angle  - the angle that the light is refracted,

Physics Vocab Unit 8

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