1 Unity The unification of distinct areas of physics leads to an explosion in the growth of knowledge and understanding.

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Presentation transcript:

1 Unity The unification of distinct areas of physics leads to an explosion in the growth of knowledge and understanding

2 Why does a compass needle always point north? A) Because it helps sailors find the north when the stars are not visible. B) Because it is the finger of God C) Because north is one of the true directions of nature. D) Because the earth behaves like a bar magnet. E) Because there is a huge magnetic mountain at the North Pole

3 Gilbert’s Breakthrough: The earth is a magnet

4 Gilbert Demonstrating Electricity to Queen Elizabeth

5 Frictional Electricity Early Experiments With Electric Shocks Friction Charging machine Spark

6 Franklin’s Laboratory Experiments With Electrical Sparks

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8 Franklin proves that lightning is electrical discharge of a cloud

9 And Captures Lightning in a Bottle

10 Galvani: Twitching Frogs Galvanize Science

11 Volta Demonstrates the Effects of Electrical Current to Napoleon

12 Oersted Discovers A Connection Between Electricity and Magnetism (DEMO) Electric current deflects a magnet

13 Ampere Makes a Coil of Current Carrying Wire into a Strong Magnet

14 Faraday: Can A Magnet Generate Electrical Current?

15 Lines of Force: Magnetic

16 Current Carrying Wires and Loops

17 Current Carrying Loops Bar Magnet

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19 When the girl acquires an electric charge, why does her hair stand up? A) The strands of hair get magnetized and repel each other B) Her hair dresser put too much jell. C) She was having a bad hair day. D) The strands of hair acquire electric charge of the same sign and repel each other.

20 Electric Field

21 Electric Field Lines of a Di-pole

22 Magnetic & Electric Fields Magnetic Dipole Electric Dipole

23 Oscillating Electric Dipole (Movie) Oscillating charges generate electromagnetic waves

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25 A Unified Theory of Electromagnetic Waves

26 Electromagnetic Waves "I have... an electromagnetic theory of light which...I hold to be great guns. All the properties of light in solids, crystals, empty space follow without further ado directly from mathematics. And the speed of light is predicted."

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