Study your flashcards anywhere!

Download the official Cram app for free >

  • Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off
Reading...
Front

How to study your flashcards.

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

A key: Read text to speech.a key

image

Play button

image

Play button

image

Progress

1/45

Click to flip

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
ultraviolet
visible light with the lowest frequency
red
visible light with the lowest frequency
violet
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
Mirage
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
Iridescence
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
white
what is the absence of color
black
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
lens
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
UV
electromagnetic radiation with very short wavelengths
x-rays
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
photons
abbreviation for 'speed of light in a vacuum'
C
the spreading out of a wave after it passes through a narrow opening
diffraction
a change in the sourse of a wave as the result of a collision with an object or boundary
reflection
the reinforcement or cancellation that occurs when two or more waves meet
interference
a bending of a path of a wave as a result of a change in wave speed
refraction
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
rainbow
a device that uses radio waves to detect object and measure their distance
radar
dangerous to human cells
UVB
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
monochromatic
describing electromagnetic waves that are in phase of moving in the same direction
coherent
referring to a beam of light containing waves that all vibrate in the same direction
polarized
the technique of transmitting light through narrow glasslike "wires" called optical fibers
fiber optics
a three-dimensional image produced by laser light
hologram
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