Sentence: a medium is a physical environment in which phenomena occur
Sentence: a mechanical wave, is a wave that requires a medium through which to travel
Sentence: an electromagnetic wave is a wave that consists of oscillating electric and magnetic fields, which radiate outward at the speed of light
Sentence: a transverse wave is a wave in which the particles of the medium move perpendicular to the direction the wave is traveling
Sentence: a longitudinal wave is a wave in which the particles of the medium vibrate parallel to the direction of wave motion
Sentence: a crest is the highest point of a wave
Sentence: a trough is the lowest point of a wave
Sentence: amplitude is the maximum distance that the particles of a wave’s medium vibrate from their rest position
Sentence: wavelength is the distance from any point on a wave to an identical point on the next wave
Sentence: a period, in physics, the time that it takes a complete cycle wave oscillation to occur
Sentence: frequency is the number of cycles or vibrations per unit of time; also the number of waves produced in a given amount of time
Sentence: the doppler effect is an observed change in the frequency of a wave when the source or observer is moving
Sentence: Reflection is the bouncing back of a ray of light, sound, or heat when the ray hits a surface that it does not go thorugh
Sentence: Diffraction is a change in the direction of a wave when the wave finds an obstacle or an edge, such as an opening
Sentence: refraction is the bending of a wave front as the wave front passes between two substances in which the sped of the wave differs
Sentence: interference is the combinations of two or more waves that results in a single wave
Sentence: constructive interference is a superposition of two or more waves that produces an intensity equal to the sum of the intensities of the individual waves
Sentence: Destructive interference standing is a superposition of two or more waves that produces an intensity equal to the difference of the individual waves.