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45 Cards in this Set

  • Front
  • Back
a discrete "packet" of energy
quantum theory
speed of light in a vacuum
300,000 km per second
electromagnetic radiation with a frequency slightly higher than that of visible light
visible light with the lowest frequency
visible light with the lowest frequency
the additive primary colors
red, green, blue
the subtractive primary colors
cyan, yellow, magenta
bulges outward and causes rays of light passing through it to bend inward
convex lens
phenomenon in which a distant object appears to be nearby as a result of reffraction of light by heated air
hollowed inward and causes rays of light passing through it to bend outward
concave lens
the process by which colors are produced by interference when light is reflected
the idea that light can be pictured as streams of tiny particles emitted by light sources
the particle theory
what color do u see when all colors of visible light enter at the same time
what is the absence of color
an arrangment of all electromagnetic radiation in order of frequency and wavelength
electromagnetic spectrum
what is a nanometer
a billionth of a meter
a piece of glass or other substance specially designed to refract light
1)all motion must be measured relative to some arbitrary reference point; and 2)the speed of light is constant in relation to any observer
theory of relativity
the apparent slowdown in time for a rapidly moving object
time dilation
low-frequency electromagnetic widely used for communication
radio wave
electromagnetic rays that is just below red visible light in terms of frequency
infrared rays
electromagnetic waves that our eyes can perceive
visible light
rays that cause sunburns
electromagnetic radiation with very short wavelengths
the most powerful form of electromagnetic radiation, consisting of extremely high frequency and energy and great penetrating ability
gamma rays
tiny bundle or "packet" of energy that travels as an electromagnetic wave
abbreviation for 'speed of light in a vacuum'
the spreading out of a wave after it passes through a narrow opening
a change in the sourse of a wave as the result of a collision with an object or boundary
the reinforcement or cancellation that occurs when two or more waves meet
a bending of a path of a wave as a result of a change in wave speed
a semicircular arc of colored bands of light in the sky formed by the dispersion of white sunlight into its component of colors by airborne water droplets
a device that uses radio waves to detect object and measure their distance
dangerous to human cells
the process of photon emission by stimulated of already-exited atoms
stimulated emission
describing light that consists of a single frequncy or wavelength, and thus of a single pure color
describing electromagnetic waves that are in phase of moving in the same direction
referring to a beam of light containing waves that all vibrate in the same direction
the technique of transmitting light through narrow glasslike "wires" called optical fibers
fiber optics
a three-dimensional image produced by laser light
discovered that light is many colors combined
Isaac Newton
proposed the wave theory of light
Christian Huygens
demonstrated that light seems to consit of two transverse waves vibrating back and forth aganst eachother
James Clerk Maxwell
demonstrated the invisible electromagnetic waves
Heinrich Hertz
discovered a strange form of radiation that resembled ultraviolet rays in its effect on matter
Wilhelm Roentgen