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Period: 1473 to 1543
COPERNIC
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Period: 1564 to
GALILEE
- the Moon has mountains just like the Earth
- The surface of the Sun has 'sunspots
- The Milky Way is made up of many more stars than was thought to exist at the time
- Venus shows a full range of phases, so it must orbit the Sun, not the Earth
- The planet Jupiter has satellites in orbit just as the planets orbit the Sun.
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Period: to
NEWTON
1672: He proved that white light is composed of lights of different colours and that therefore coloured light is simpler than white light. 1672: In the same vein, he designed his mirror telescope. This was done following his reflections on chromatic aberrations (which he thought unavoidable) and his experiments on the prism. 1687: Publication of Natural Philosophy and Mathematical Principles, which laid the foundations of dynamics. -
Period: to
AMPERE
-He indicated the law of "Ampère's man" which gives the direction of the magnetic field created by a conductor. -He discovered that currents attract each other if they are in the same direction and repel each other if they are not. -He also shows that a solenoid behaves like a bar magnet. -1822: He demonstrated the phenomena of magnet-current rotation in Faraday's experiments on two electric circuits and gave the fundamental law of electrodynamics (this is how he named it). -
Period: to
EINSTEIN
-He founded the theory of relativity, which introduced the speed of light in a vacuum as a universal constant. -According to him, thermal radiation is characterised by spectral domains and energy quanta belonging to these domains: he gives any atom located in the black body a certain probability of absorption or forced emission proportional to the energy of the radiation. -In 1905, he used the idea of quanta in his theory of the photoelectric effect