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Phys Sci - Chpt 18

vocabulary words

QuestionAnswer
electromagnetic wave transverse waves made of changing electric and magnetic fields
photons packets of electromagnetic energy
intensity rate at which a wave's energy flows through a given unit of area
electromagnetic spectrum the full range of frequencies of electromagnetic radiation
amplitude modulation amplitude of wave is varied - AM radio transmits this way
frequency modulation the frequency of the wave is varied - FM radio broadcasts this way.
transparent transmits light -(light passes through-clear image)
translucent scatters light - (light passes through but images are fuzzy)s
opaque either absorbs or reflects all of the light that strikes it (cannot see through)
image copy of an object formed by reflected waves of light
regular reflection happens when parallel light waves strike a surface and it all reflects in the same direction.
diffuse reflection happens when parallel light waves strike a rough, uneven surface and it reflects it many different directions
polarized light light with waves that vibrate in only one plane
scattering light is redirected as it passes through a medium
primary colors can be combined in many ways to create all possible colors - Light - red, green and blue; pigment - cyan, yellow and magenta
secondary colors Light - cyan, yellow and magenta (these are a combination of two primary colors); pigments - red, green and blue
complementary colors of light any two colors of light that combine to form white light
pigment material that absorbs some colors of light and reflects other colors
complementary colors of pigments any two colors of pigments that combine to make black
dispersion process where white light separates into colors
incandescent
fluorescence
luminous
Created by: msparks