light vocab Flashcards
A piece of glass or plastic with many parallel slits that acts like a prism, causing WhiteLight that passes through it to separate into its component colors (the visible spectrum)
diffraction grating
transverse waves that transfer energy by radiation, vary in length from a very long radio waves to extremely short gamma waves
electromagnetic radiation
light produced when ultraviolet radiation inside of fluorescent lightbulb causes it’s fluorescent coating to glow; uses less energy than incandescent light
fluorescent light
high-frequency electromagnetic waves that travel at the speed of light, have no mass or charge, and are the most penetrating form of radiation
gammaRay
light produced by a thin tungsten wire, or filament, that is heated and then incandescent lightbulb until it glows
incandescent light
electromagnetic waves that have a wavelength slightly longer than visible light; indicates the presence of heat
infrared radiation
Radio waves with the highest frequency and energy; use in communications and microwave ovens
microwave
process of adding voice, music, video, computer information, or other data to radio waves by using electrical currents to vary either amplitude and frequency
modulation
Materials you can’t see through because they absorb or reflect all light
opaque material
A tiny particle like bundle of radiation
photon
colored material that absorbs some colors and reflects others; the colors of it are determined by the colors they reflect
pigment
electromagnetic waves that have a long way blunts (low frequencies;) used in communications
radio wave
occurs when a wave strikes an object and bounces off
reflection
The bending of waves, caused by changing their speed speed
refraction
Materials that can be easily seen through because they allow some light pass through them, but not enough for a clear image
translucent material
Materials that can be clearly seen through because they allow light to pass through them
transparent material
electromagnetic waves that have a higher frequency than visible light; abbreviated uv
ultraviolet radiation
electromagnetic waves and the only part of the electromagnetic spectrum we can see-light
visible radiation
electromagnetic waves having a wavelength shorter (higher frequency) then ultraviolet radiation; often used in medical diagnosis and photography because they can penetrate human human tissue
x-ray
The bending of waves around a barrier
diffraction
