o Course homepage, Ongoing Lectures, TT-system
Tu 3:30-4:20, RAS 213 ; Fri 4-5, RLM 5.104
Lec. 40 Special theory of relativity (STR) -- II
o
Basic
postulates of STR
·
Constancy of the
speed of light in all inertial frames
·
Law of physics are the same in all inertial frames. No experiment can be
performed to measure the speed of an inertial frame.
o
Transformation among space-time coordinate systems
·
Galilean
transformation: Space and time coordinates are independent of each other.
·
Lorentz transformation: Space and time coordinates are inter-dependent.
o
Velocity
addition formula: Verify constancy of
speed of light.
o
Time dilation (Revisit): Moving clock ticks slower
·
Intuitive reasoning
based on a light-clock ( a review).
·
Derivation based
on Lorentz transformation (see also example 6 in the
text)
·
Experimental confirmation:
Lengthening the life-time of unstable particles.
·
Twin paradox and
its resolution (see text discussion)
o
Length
contraction: (See example 6, a
derivation based on Lorentz transformation)
o
Doppler shift:
·
Doppler shift of
sound waves (Nonrelativistic)
·
Doppler shift of
light waves (Relativistic)
·
Motion of distant
heavy body
è Hubble’s expansion of the universe
è Big bang cosmology.
o
Energy
momentum of a particle.
Reminders:
o
Come bring your
questions on HW14.
o
Participate informal discussions on STR.
Please mark your calendar. See time and place
above.