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Flashcards - Praxis Middle School Science: Waves & Optics

Flashcards - Praxis Middle School Science: Waves & Optics
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photon
A photon is an elementary particle, the quantum of all forms of electromagnetic radiation including light
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Doppler effect
The Doppler effect is the change in frequency or wavelength of a wave for an observer moving relative to its source
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pigments
A pigment is a material that changes the color of reflected or transmitted light as the result of wavelength-selective absorption
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color
Color or colour is the visual perceptual property corresponding in humans to the categories called red, blue, yellow, etc
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pure spectral color
A spectral color is a color that is evoked by a single wavelength of light in the visible spectrum, or by a relatively narrow band of wavelengths, also known as monochromatic light
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visible light spectrum
The visible spectrum is the portion of the electromagnetic spectrum that is visible to the human eye
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microwaves
Microwaves are a form of electromagnetic radiation with wavelengths ranging from one meter to one millimeter; with frequencies between 300 MHz and 300 GHz
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frequency
Frequency is the number of occurrences of a repeating event per unit time
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electromagnetic spectrum
The electromagnetic spectrum is the collective term for all known frequencies and their linked wavelengths of the known photons
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sound
In geography, a sound is a large sea or ocean inlet larger than a bay, deeper than a bight, and wider than a fjord; or a narrow sea or ocean channel between two bodies of land
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transverse wave
A transverse wave is a moving wave that consists of oscillations occurring perpendicular to the direction of energy transfer
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rarefaction
Rarefaction is the reduction of an item's density, the opposite of compression
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rarefaction
Rarefaction is the reduction of an item's density, the opposite of compression
transverse wave
A transverse wave is a moving wave that consists of oscillations occurring perpendicular to the direction of energy transfer
sound
In geography, a sound is a large sea or ocean inlet larger than a bay, deeper than a bight, and wider than a fjord; or a narrow sea or ocean channel between two bodies of land
electromagnetic spectrum
The electromagnetic spectrum is the collective term for all known frequencies and their linked wavelengths of the known photons
frequency
Frequency is the number of occurrences of a repeating event per unit time
microwaves
Microwaves are a form of electromagnetic radiation with wavelengths ranging from one meter to one millimeter; with frequencies between 300 MHz and 300 GHz
visible light spectrum
The visible spectrum is the portion of the electromagnetic spectrum that is visible to the human eye
pure spectral color
A spectral color is a color that is evoked by a single wavelength of light in the visible spectrum, or by a relatively narrow band of wavelengths, also known as monochromatic light
color
Color or colour is the visual perceptual property corresponding in humans to the categories called red, blue, yellow, etc
pigments
A pigment is a material that changes the color of reflected or transmitted light as the result of wavelength-selective absorption
Doppler effect
The Doppler effect is the change in frequency or wavelength of a wave for an observer moving relative to its source
photon
A photon is an elementary particle, the quantum of all forms of electromagnetic radiation including light
amplitudes
The amplitude of a periodic variable is a measure of its change over a single period
wavelengths
In physics, the wavelength of a sinusoidal wave is the spatial period of the wave-the distance over which the wave's shape repeats, and thus the inverse of the spatial frequency
reflection of waves
Reflection is the change in direction of a wavefront at an interface between two different media so that the wavefront returns into the medium from which it originated
resonance
In physics, resonance is a phenomenon in which a vibrating system or external force drives another system to oscillate with greater amplitude at a specific preferential frequency
opacity
Opacity is the measure of impenetrability to electromagnetic or other kinds of radiation, especially visible light
Diffraction
Diffraction refers to various phenomena which occur when a wave encounters an obstacle or a slit
Interference
In physics, interference is a phenomenon in which two waves superpose to form a resultant wave of greater, lower, or the same amplitude
blue shift
A blueshift is any decrease in wavelength, with a corresponding increase in frequency, of an electromagnetic wave; the opposite effect is referred to as redshift
sonic boom
A sonic boom is the sound associated with the shock waves created by an object traveling through the air faster than the speed of sound
photoelectric effect
The photoelectric effect or photoemission is the production of electrons or other free carriers when light is shone onto a material
wave-particle duality
Wave–particle duality is the concept that every elementary particle or quantic entity may be partly described in terms not only of particles, but also of waves
angle of incidence
In geometric optics, the angle of incidence is the angle between a ray incident on a surface and the line perpendicular to the surface at the point of incidence, called the normal

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