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Waves
Question | Answer |
---|---|
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 |