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final exam
lovely.
33
Physics
Undergraduate 2
12/12/2009

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Term
Electromagnetic wave
Definition
a wave emitted by vibrating electric charges (often electrons) and composed of vibrating electric and magnetic fields that regenerate one another
Term
in what form does radiant energy travel?
Definition
electromagnetic waves
Term
radio wave
Definition
an electromagnetic wave with long wavelength
Term
mircowave
Definition
an electromagnetic wave with short wave length
Term
infrared
Definition
electromagnetic wave frequencies longer and lower than that of visible light. Infrared is a slightly lower frequency than red light.
Term
visible
Definition
the only electromagnetic waves we can see (lower wave frequencies). the portion of the electromagnetic spectrum that is visible to (can be detected by) the human eye.
Term
Ultraviolet light
Definition
The invisible rays of the spectrum that are outside of the visible spectrum at its short-wavelength violet end. wave lengths shorter (higher) than light but longer (lower) than x-rays.
Term
x-ray
Definition
Electromagnetic wave shorter (higher) than ultraviolet rays but longer (lower) than gamma rays.
Term
gamma rays
Definition
electromagnetic radiation emitted during radioactive decay and having an extremely shortest wavelength, highest energy and wavelength
Term
reflection
Definition
the return of light into the medium from which it came
Term
the law of reflection
Definition
the angle of reflection equals the angle of incident
Term
diffuse reflection
Definition
reflection in irregular directions from an irregular surface
Term
refraction
Definition
the bending of a wave through either a nonuniform medium or from one medium to another, caused by differences in wave speed
Term
reflection
Definition
the return of light into the medium from which it came
Term
subtractive primary colors
Definition
the pigments of cyan (blue), magenta (red), and yellow. when mixed in certain proportions, they reflect any other color in the visible-light part of the electromagnetic spectrum.
Term
scattered
Definition
light being re-emitted in all directions
Term
critical angle
Definition
the smallest angle of incidence for which light is totally reflected
Term
internal reflection
Definition
occurs when a ray of light strikes a medium boundary at an angle larger than a particular critical angle with respect to the normal to the surface.
Term
rainbow
Definition
an arc of colored light in the sky caused by refraction of the sun's rays by rain
Term
concave
Definition
curving inward
Term
convex
Definition
curving outward
Term
focal point
Definition
the point of convergence for light parallel to the principle access
Term
focal length
Definition
the distance between the center of the lens and either focal point.
Term
wave nature
Definition
all energy (and thus all matter) exhibits both wave-like and particle-like properties
Term
homogeneous
Definition
uniformly composed mixtures. have definite and consistent chemical composition and physical properties.
Term
element
Definition
any material made of only one type of atom
Term
compound
Definition
a substance formed when atoms of different elements bond to one another
Term
green’s compliment is
Definition
magenta (compliment of)
Term
red’s comliment is
Definition
cyan (compliment of)
Term
blue’s compliment is
Definition
yellow (compliment of)
Term
Pigments that absorb magenta show
Definition
green (absorbs what color)
Term
Pigments that absorb yellow shows
Definition
blue (absorbs what color)
Term
Pigments that absorb cyan show the color
Definition
red (absorbs what color)
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