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Waves

QuestionAnswer
Amplitude Height of a wave from the midpoint to the crest or trough effects the volume of a sound
As a car speeds away from an observer, the observed frequency of the car's horn will... decrease
blue shift the stretching of the wavelength of light so the light is seen as "shifted" towards the blue part of the spectrum; happens when object and observer are moving toward each other
difference between mechanical waves and electromagnetic waves -Mechanical waves need a medium in order to exist -Electromagnetic waves do not need a medium, they can travel in a vacuum -Electromagnetic waves travel at the speed of light, 300,000,000 m/s. This is much faster than any mechanical wave, like sound,
Doppler Effect an observed change in thee frequency of a wave when the source or observer are moving
electromagnetic spectrum arrangement of electromagnetic waves according to their wavelengths and frequencies
Electromagnetic wave A wave that can transmit energy in a vacuum - this wave doesn't need a medium to travel through
electromagnetic waves examples light, radio, lighting, x-rays, ultraviolet
emission spectrum a series of bright lines of particular wavelengths produced by a hot gas under low pressure
Frequency How many wave peaks pass a certain point per given time. If you increase the frequency you increase the pitch
frequency the number of electromagnetic waves traveling past a fixed point in a specific unit of time (usually one per second)
Gas Mechanical waves travel slowest in a
Infrared radiation part of the electromagnetic spectrum where wavelengths are just longer than those of ordinary, visible red light, but shorter than those of microwaves; also known as heat
Liquid Mechanical waves move fastest in a
Longitudinal wave A wave where energy travels parallel to the movement of the particles
Mechanical waves This kind of wave needs a medium to travel through
Mechanical waves examples Sound, water, thunder
Medium Material through which a wave travels
photon a small packet of light energy
radiation the transverse of energy (heat) through space by electromagnetic waves
radio waves part of the electromagnetic spectrum where wavelengths are longest consisting of microwaves, radar, radio and TV waves; generally used for long-distance communication
red shift the stretching of the wavelength of light so the light is seen as "shifted" towards the red part of the spectrum; happens when object and observer are moving away from each other
Reflection when waves bounce back. The angle of the incidence equals the angle of reflection
Refraction the bending of a wave changing direction from one medium to another . If it travels from a less dense medium to a more dense medium it bends TOWARDS the normal
Resting position The midpoint of a wave
Seismic wave Example of a mechanical wave
Solid Mechanical wave travels fastest in a
Source Starting point of the wave
Spectroscopy The study of the properties of light that depends on wavelength
Transverse wave A wave with vibration at perpendicular angles to the direction the wave is traveling
Ultraviolet wave part of the electromagnetic spectrum where wavelengths are just shorter than those of ordinary , visible violet light but longer than those of x-rays
UV ray Examples of an electromagnetic wave
Visible part of the electromagnetic spectrum where wavelengths are just longer than those of ultraviolet radiation and just shorter than those of infrared radiation; a form of electromagnetic radiation that is visible to most human eyes
wave a disturbance that travel through a medium that transfers energy
wave crest the top of an electromagnetic wave
wavelength horizontal disturbance between the crest or troughs. Crest to crest or trough to trough. Inversely connected to pitch
wavelength the disturbance the crest of one wave and the crest of the next wave
wave speed the speed at which a wave travels