mode 7 fam people Flashcards
what did James clerk Maxwell do?
unified electricity and magnetism-
what did galileo try to do to measure the speed of light?
-hilltops and lamps
-the major flaw of this experiment was human reaction time
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what did ole romer do
the first successful measurement of the speed of light-
using the moons of Jupiter and measuring the time difference between the earth going towards vs going away
who was Christian Huygens?
mathematically help the accuracy of ole’s experiment
who was Hippolyte Fizeau’s and what was his experiment
toothed wheel on top of a hill with a mirror instead of an assistant
knowing the number of teeth and rotation rate
calculated it within 4%
Max Planck
he devised a solution to the black body curve
saying that light is quantised and energy comes in little packets called photons
newton and Huygens
newton first stated that light was comprised of the colours of the rainbow. also composed a corpuscular model of light.
Christian Huygens,- wave model of light
light made up of waves vibrating up and down perpend to the direction to travel
what is Huygens principle?
that each point on an advancing wavefront is the source of secondary wavelets-
wavelets all move foward as the same speed as the original wave.
Franics Grimald and his experiment
allowed rays of light to enter a dark room through a small hole in a piece of cardboard the light passed through another hole =light projected larger image.
Thomas young
youngs double-slit experiment.
Malu’s law
polarising light
wiens’s law
relationship between temp and wavelength
Heinrich hertz
first abserved photo electric effect when looking at radio waves. look at diagram in book
philipp lenard
constructed futher experiments to study how the energy emmited by photo electrons varied with the intensity of the ligh source used
Albert Einstein and the photo electric effect
Plancks idea to all light- photons
special relativity
