1.  Imagination is more important than knowledge  Knowledge is limited.  Imagination encircles the world www.gsi.de/~wolle

2. The Brandenburg Gate at 95 percent of the speed of light www.tat.physik.uni-tuebingen.de/~weiskopf/gallery

3. Flight to Saturn with 99 percent of the speed of flight www.tat.physik.uni-tuebingen.de/~weiskopf/gallery

4. Flight to the Eiffel Tower with 99 percent of the speed of light www.tat.physik.uni-tuebingen.de/~weiskopf/gallery

5. This video visualizes the apparent geometry only. The observer is moving with 90 percent of the speed of light www.tat.physik.uni-tuebingen.de/~weiskopf/gallery

6. Flight of the Enterprise at 95 percent of the speed of light www.gris.uni-tuebingen.de/gris/proj/scivis.html

7. Edwin Abbott Abbott (1838-1926)

24.  Isaac Newton:  „clockwork universe“  Albert Einstein: „space-time relation“ A sundial - Constant time ? Moving clocks run slow run slow

25. Relativity before Einstein The train revisited The velocity of the ball relative to Dave is 40 ft/s The velocity of Dave relative to Nolan is 50 ft/s So the velocity of the ball relative to Nolan is 90 ft/s The 300,000,000 meters, relative to Dave, is not really 300,000,000 meters relative to Nolan. One second for Dave is not one second for Nolan.

26. As long as two persons remain at rest relative to each other, both agree that each other´s clock tick-tocks at the same rate as their own. As long as two persons remain at rest relative to each other, both agree that each other´s clock tick-tocks at the same rate as their own. Time and moving clocks Since the speed of light is constant, the person at rest thinks it takes longer for the moving person´s clock to tick-tock than its own

27. Time and moving clocks

29. The universal speed limit  Distances shrink in the direction of motion  Mass (appears to) increase with speed  Nothing can travel faster than light

30. The Doppler Effect  As the police car approaches the sound waves are compressed and the pitch rises.  As it recedes the sound waves are stretched and the pitch decreases.

31. Relativistic Doppler and Searchlight Effects for v/c=0.1 v/C=0.0 v/c=0.1 scene ahead v/c=0.1 scene behind

32. Riding a tram at near-light speeds: the head-light effect brightens the scene ahead and darkens the scene behind the head-light effect brightens the scene ahead and darkens the scene behind www.anu.edu.au/Physics/Searle

33. E = energy (measured in joules, J) m = mass (measured in kilograms, kg) c = the speed of light (metres per second)  chemical energy  thermal energy  kinetic energy

34. If we use this energy to power a 100 Watt light bulb how long could we keep it lit for?

35. sun mass: 2 10 30 [kg] 75% hydrogen (H), 25% helium (He) H -> He 7 10 11 [kg/s] energy output: 4 10 26 [Ws] 1,4 [kWs/m 2 ] reach the earth mass difference: 0,050 10 -27 [kg] energy gain: 0,45 10 -11 [J] energy gain: 28,3 [MeV]

36. Typically, a uranium alpha decay produces 4.3 MeV of energy We can calculate the mass which has been turned into energy in accordance with E=mc 2 m=0.000,000,000,000,000,000,000,000,000,007,6 00 kg

37. Typically, in the case of 235 U fission around 200 MeV of energy (0.000,000,000,032 J) is released. A very tiny amount of energy? However, it is about a million times more energy than is released by the burning of one molecule of petrol (gas) in a car´s engine. Put another way, if you currently use a tank of petrol each week but could use the energy provided by one tank of 235 U fission instead, you wouldn´t need to refill your car for over 19,000 years!

38. In case of 1000 kg of 235 U fission a mass of 1 kg is released into energy. E=9 10 16 J = 2.5 10 10 kWh 2.8 10 9 kg coal is needed to produce the same energy.

39. If we plunge through the tram, all of ist parts Terrel rotate independently making it appear to turn inside out. www.anu.edu.au/Physics/Searle