Continued with Relativity:
Showed using long spaceship example that events at different locations that occur at the same time for one observer do not necessary occur at the same time for an observer moving at constant speed with respect to that observer.
Showed bouncing light clock and how to get time dilation from this set-up.
Students worked out time dilation graphically.
Derived time dilation using Pythagorean Theorem
Tried using light clock to get length contraction.
Did example of traveling to distant star at fast speed and how time dilation and length contraction are related.
Discussed relativistic mass increase using Andy and Bob example and pushing spacecraft examples.
Simply stated E = mc^2 but worked out how much energy in 1 kg of matter and that it was more energy than lifting 100x the population of the Earth to a height of 100 m.
Kindergarten approach to general relativity. Light has energy, energy and mass are related, mass is affected by a gravitational field, light is bent in a gravitational field, light moves at the same speed for each observer. Therefore, the closer to the source of gravity, the slower the clock will tick.
Showed Hewitt video on Relativity.
Really didn't go over very well. MANY students paid no attention and carried on side conversations the entire class. Told students I would go back to having them do experiments rather than have me talk.
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