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Flashcards - Light, Sound & Waves

Flashcards - Light, Sound & Waves
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rarefaction
Rarefaction is the reduction of an item's density, the opposite of compression
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prism
PRISM is a clandestine surveillance program under which the United States National Security Agency collects internet communications from at least nine major US internet companies
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lens
A lens is a transmissive optical device that focuses or disperses a light beam by means of refraction
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plane mirror
A plane mirror is a mirror with a flat reflective surface
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convex mirror
A curved mirror is a mirror with a curved reflecting surface
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Sound waves
In physics, sound is a vibration that propagates as a typically audible mechanical wave of pressure and displacement, through a medium such as air or water
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frequency
Frequency is the number of occurrences of a repeating event per unit time
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greenhouse effect
The greenhouse effect is the process by which radiation from a planet's atmosphere warms the planet's surface to a temperature above what it would be without its atmosphere
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visible light region
The visible spectrum is the portion of the electromagnetic spectrum that is visible to the human eye
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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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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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electromagnetic spectrum
The electromagnetic spectrum is the collective term for all known frequencies and their linked wavelengths of the known photons
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
visible light region
The visible spectrum is the portion of the electromagnetic spectrum that is visible to the human eye
greenhouse effect
The greenhouse effect is the process by which radiation from a planet's atmosphere warms the planet's surface to a temperature above what it would be without its atmosphere
frequency
Frequency is the number of occurrences of a repeating event per unit time
Sound waves
In physics, sound is a vibration that propagates as a typically audible mechanical wave of pressure and displacement, through a medium such as air or water
convex mirror
A curved mirror is a mirror with a curved reflecting surface
plane mirror
A plane mirror is a mirror with a flat reflective surface
lens
A lens is a transmissive optical device that focuses or disperses a light beam by means of refraction
prism
PRISM is a clandestine surveillance program under which the United States National Security Agency collects internet communications from at least nine major US internet companies
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
Thermal imaging
Infrared thermography , thermal imaging, and thermal video are examples of infrared imaging science
bursts
Gamma-ray bursts are extremely energetic explosions that have been observed in distant galaxies
microwave
Microwaves are a form of electromagnetic radiation with wavelengths ranging from one meter to one millimeter; with frequencies between 300 MHz and 300 GHz
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
simple lens
In optics, a simple lens or singlet lens is a lens consisting of a single simple element
dispersion
In optics, dispersion is the phenomenon in which the phase velocity of a wave depends on its frequency
index of refraction
In optics, the refractive index or index of refraction n of a material is a dimensionless number that describes how light propagates through that medium
Interference
In physics, interference is a phenomenon in which two waves superpose to form a resultant wave of greater, lower, or the same amplitude
fluorescence
Fluorescence is the emission of light by a substance that has absorbed light or other electromagnetic radiation
speed
In everyday use and in kinematics, the speed of an object is the magnitude of its velocity ; it is thus a scalar quantity

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