 Imagination is more important than knowledge  Knowledge is limited.  Imagination encircles the world

The Brandenburg Gate at 95 percent of the speed of light

Flight to Saturn with 99 percent of the speed of flight

Flight to the Eiffel Tower with 99 percent of the speed of light

This video visualizes the apparent geometry only. The observer is moving with 90 percent of the speed of light

Flight of the Enterprise at 95 percent of the speed of light

Edwin Abbott Abbott ( )

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

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.

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

Time and moving clocks

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

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.

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

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

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

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

sun mass: [kg] 75% hydrogen (H), 25% helium (He) H -> He [kg/s] energy output: [Ws] 1,4 [kWs/m 2 ] reach the earth mass difference: 0, [kg] energy gain: 0, [J] energy gain: 28,3 [MeV]

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

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!

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

If we plunge through the tram, all of ist parts Terrel rotate independently making it appear to turn inside out.