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40 Cards in this Set

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Transvrse waves that transfer energy by radiation.
ELECTROMAGNETIC RADIATION
A tiny particlelike bundle of radiation.
PHOTON
Electromagnetic waves that have long wavelengths.
RADIO WAVE
Process of adding voice, music, video, computer information, or other data to radio waves by using electrical currents to vary either amplitude or frequency.
MODULATION
Radio waves with the highest frequency and energy.
MICROWAVES
Electromagnetic waves that have a wavelength slighty longer than visible light.
INFRARED RADIATION
Electromagnetic waves in the only part of the electromagnetic spectrum we can see light.
VISIBLE RADIATION
Electromagnetic waves that have a higher frequency than visible light
ULTRAVIOLET RADIATION
Electromagnetic waves having a wavelength shorter than ultraviolet radiation.
X RAY
High-frequency electromagnetic waves that travel at the speed of light, have no mass or charge, and are the most penetrating form of radiation.
GAMMA RAY
materials you can't see through because tehy absorb or reflect all light.
OPAQUE MATERIALS
Mareials that can be clearly seen through because they allow light to pass through them.
TRANSPARENT MATERIALS
Materials that can be hazily seen through because they allow some light to pass through them, but not enough for a clear image.
TRANSLUCENT MATERIALS
Color material that absorbs some colors and reflects others.
PIGMENT
Light produced by a thin tungstenwire, or filament, that is heated in an incandescent bulb until it glows.
INCANDESCENT LIGHT
Light produced when ultraviolet radiation inside a flourescent light bulb causes its flourescent coating to glow.
FLOURESCENT LIGHT
occurs when a wave strikes an object and bounces off.
REFLECTION
The bending of waves, caused bt changing their speed.
REFRACTION
The bending of waves around a barrier.
DIFFRACTION
A peice of glasses or plastic with many parrallel slits that acts like a prisim, causing white light that passes through it to separate into its component colors.
DIFFRACTION GRATING
A mirror with flat surface that produces a virtual image.
PLANE MIRROR
An image formed of diverging light through rays, as in a plane or convex mirror, or seen through a concave lens.
VIRTUAL IMAGE
A mirror whose surface curves inward.
CONCAVE MIRROR
A point on the optical axis of a concave mirror or convex lens where the light rays come together.
FOCAL POINT
The distance from the center of the lens or mirror to its local piont.
FOCAL LENGHT
An image produced where light rays converge, as with a concave mirror or convex lens.
REAL IMAGE
A mirror with a surface that curves outward.
CONVEX MIRROR
Lenses that are thicker in the middle than at the edges.
CONVEX LENSES
Lenses that are thinner in the middle and thicker at the edges and thus curve inward.
CONCAVE LENSES
An optical instructment that uses two convex lenses to magnifying distant objects.
REFRACTING TELESCOPE
aN optical instrument that uses a concave mirror, a plane mirror, and a convex lens to magnify distant objects.
REFLECTING TELESCOPE
aN optical instrument that uses two convex lenses with relatively short focal lengths to magnifying small, close-up objects.
MICROSCOPES
A lens with a short focal length that produces a relatively small image of an object, but includes much of the object's surroundings.
WIDE-ANGLE LENS
A lens having a long focal length and producing an enlarged, close-up image of an object.
TELEPHOTO LENS
light in which the transverse waves vibrate only along one plane.
POLARIZED LIGHT
A devise that emits a beam of photons that travel in the same direction and phrase, producing a beam of coherent light.
LASER
A beam of light in which all the electromagnetic waves ravel with the crests and troughs aligned.
COHERENT LIGHT
Light rays that are nearly parallel but spread out because their selectromagnetic waves do not travel in the same direction.
INCOHERENT LIGHT
Occurs when all the lights striking the surface between two materials is reflected totaly back into the first material.
TOTAL INTERNAL REFLECTION
Transparent glass fiber that can transmit light from one place to another.
OPTICAL FIBER