1140 Definitons Flashcards
Particle theory
Isaac Newton
5.80 x10^-7 m
wavelength of yellow light
visible spectrum
includes only light waves
electromagnetic spectrum
includes ultraviolet waves, light waves, infrared waves, and others
observed the eclipse of Jupiter’s moon Io to determine the speed of light
Olaus Roemer
showed that light travels 10,000 times faster than Earth in its orbit
James Bradley
used a rotating toothed wheel to measure the speed of light
Armand Fizeau
used a rotating plane mirror to measure the speed of light
Jean Foucault
received a Nobel price in 1907 for studies of light
Albert Michelson
invented the vacuum bottle in 1892
James Dewar
waves arriving out of phase and cancelling each other out
destructive interference
waves arriving in phase and strengthening each other
constructive interference
a device that measures extremely small distances with interference of light
interferometer
invented the interferometer
Albert Michelson
light emitted at random and in all direction
scattered light
light vibrating in a single plane
polarization
first to investigate static electricity
Thales of Miletus
insulators
nonmetal poor conductors
good conductors
silver, gold, copper
neither a good conductor nor a good insulator
semiconductor
formulated three laws of static electricity
Benjamin Franklin
measured forces between charged bodies
Charles de Coulomb
Good insulating materials
mica, porcelain, glass
three ways an object can acquire a static electrical charge
friction, induction, direct contact
Electric charge can neither be created nor destroyed
law of conservation of charge
an object that can accept or supply electrons
ground
a device that stores static charges
Leyden jar
a positively charged conductor, a negatively charged conductor, and uncharged insulating material in between
capacitor
ability to hold a charge
capacitance
equal to one coulombs of charge for every volt of potential difference
one farad of capacitance
a device that produces a static electrical charge
an electrostatic generator
an electrostatic generator that is capable of building extrememely high electric potentials
Van de Graaff generator
invented the first electrostatic generator
Otto van Guericke
measures the electric potential of a charged body
electroscope
invented the telegraph, the first invention with a useful purpose for electricity
Samuel F.B. Morse
