Tell me more about these
light clocks?
As seen by someone riding along
with the constant
velocity light clock,
both the clock and the mover seem to be at rest. The
light pulse would go 300,000,000 meters down in a time of
one second and it would go the 300,000,000 meters up in
another second and would not appear to move sideways at
all.
As seen by a stationary
observer, watching the mover and the clock fly by at say
150,000,000 m/s (50% c)
the event would look very different.
The light pulse would travel
down and to the right along the hypotenuse of the
triangle formed by the light pulse traveling down
300,000,000 meters and right 150,000,000
meters.
This means that the stationary
observer would see the light pulse travel more than
300,000,000 meters.
Question:
 Can the stationary observer
see the light pulse travel faster than
c?
This means that the stationary
observer would see the clock take 1.15 seconds to travel
down, and another 1.15 seconds to travel back up. One
tick and tock took 2.31 seconds!
The mover would say, "2.0
seconds took 2.0 seconds."
The stationary observer would
say, "Mover, your clock that was supposed to time 2.00
seconds in your frame, took 2.31 seconds in
mine!"
Question:
 According to the stationary
observer, did the mover's clock speed up or slow
down?
Lesson 2: Time
Dilation
 The
equation.
 Where
does that come from?
 I still don't get it!
Give
me the basketball analogy.
 So what? There's an
equation. How
do I use the equation in the game?
 Practice
Problems.
 Examples
to aid your practice.
