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45 Cards in this Set

  • Front
  • Back
additive
- the process of adding colours of light together to produce new colours
concave
- a mirror or lens that curves inward near the centre
convex
- a mirror or lens that curves outward near the centre
diffuse
- when light reflects off an irregularly shaped surface resulting in light going in many different directions
electromagnetic
radiation
- all types of radiation produced by moving electric charges, such as light, infared, ultraviolet, X-rays, microwaves, and radio waves
focus
- the name of the spot where parallel rays of light are brought together to a common point by a lens or a mirror
incident
- light that falls on an object
lens
- a transparent optical device with curved sides that is used to bring light rays together, or to spread them apart
luminous
- a body that produces its own light (ie. a burning match is luminous)
non-luminous
- a body that can only be seen by reflected light; it does not produce its own light (ie. a textbook is non-luminous)
opaque
- a material that does not transmit any incident light; all of the light falling on this material is either absorbed and/or reflected
plane
- a flat surface
ray
- a pencil-thin beam of light
real image
- an image in which light is actually arriving at the image location
refraction
- the bending of light as it passes from one material to another
regular
- when light reflects off a flat surface resulting in the reflected light all going in the same direction
subtractive
- the process of absorbing or taking away colours from light in order to produce new colours
translucent
- a material that transmits some incident light; the remaining light falling on this material is either absorbed and/or reflected
transparent
- a material that transmits all light falling on it
virtual image
- an image in which light is not actually arriving at the image location
visible spectrum
- the range of colours that are visible to the human eye (ie. ROY G BIV ~ red, orange, yellow, green, blue, indigo, violet)
watts
- a unit of power
more power = more intensity
= Joule/second
W = J/second
joule (J)
- a unit used to measure energy or work
normal
- the line that is at right andles (ie. 90°) to a surface
light
- the form of energy we can see
natural light source
- a non-human-made source of light, such as the sun
radiate
- to send out energy in the form of waves or rays
radiation
- the transfer of radiant energy, such as light
radiant energy
- energy transferred or emitted as waves or rays in all directions
artificial light source
- a human-made source of light
intensity
- brightness (of light); describes how much energy a surface will receive
incandescent source
- an object that can be heated to such a high temperature that it emits visible light
incandescence
- the emission of visible light by a hot object
flourscent source
- a source that produces light when exposed to light of a particular wavelength
phosphorescent source
- a substance that gives off visible light released after the energy has been absorbed by certain particles that have stored this energy for a while. The light continues for some time even after it is no longer exposed to light.
phosphorescence
- the persistent emission of light following exposure to and removal of a source of radiation
chemiluminescence
- the emission of light resulting from chemical action and not involving heat
chemiluminescence source
- chemical reaction that produces particles that gives off visible light energy
bioluminescence
- the emission of light produced by chemical reactions inside the bodies of living creatures
bioluminescent source
- an organism that relies on chemical reactions inside its body to produce light (ie. a firefly)
kilowatt hour
- a unit of electrical energy; the amount of energy transmitted by one thousand watts of power over a period of one hour; 1 kW h of power used for 1 h
ray diagram
- a representation of the path of light by using a straight line with an arrow
transparent
- allowing light to pass through
translucent
- allowing some light to pass through. The light, however, is scattered from its straight path.
opaque
- not allowing any light to pass through