PHYS 215 - Special Relativity - Quiz #2 - 09/24/10 Name_
1) Use the following events in a "lab" frame to demonstrate that clocks are not synchronized in all inertial frames.
Event A: Two photons emitted simultaneously in opposite directions from a source.
Physics 215 - Special Relativity - Solutions #2
T+W 1-2) a) The light-time of the signal was 4 h 6 m. This is converted into other times by the well known conversion
factors or distance by multiplying times by c.
T = 4 60 6 = 246 min
12
D = c t = 4.4 10 m
Physics 215 - Special Relativity - Solutions #4
T+W L-6) a) The Lab observers locate the ends of the meter stick at a fixed instant of time in their frame. The (t, x, y)
events associated with the ends are
lower left:
(0, 0, 0)
upper right: (0, x, y)
x an
Physics 215 - Special Relativity - Solutions #5
T+W 4-2) Changing reference frames is a more precise statement about how the paradox is resolved than making a turn.
As we know, the lattice of clocks in a moving frame is necessarily observed with all of th
Physics 215 - Special Relativity - Solutions #3
T+W 3-6) a) This is not a contradiction because each observer describes the same behavior - exactly what is expected
since there is complete symmetry between the two observers One could argue that the clocks
Physics 215 - Special Relativity - Solutions #6
PHYS215-1) Your "wristwatch" time is shorter by the factor , so, with T = 80 years, the time you gain is.
T = T
With =
8
5
8
= 1.7 10
T
= T 1
1
many calculators will not have the required precision to eval
PHYS 215 - Special Relativity - Quiz #3 - 09/29/10 Name_
1) In the lab frame, a light pulse is (A) emitted from the origin and (B) absorbed in a detector on the y axis at y=L. List the
events A and B as observed in the lab frame, and as observed from the
PHYS 215 - Special Relativity - Quiz #5 - 10/13/10 Name_
1) Given the Events A at (0,0) and B at (t 0 , x0 ) in one frame, derive the relation t(x) between Event B coordinates (t, x) in
any other frame.
Answer) The graph of t(x) is the "invariant hyperbol
PHYS 215 - Special Relativity - Quiz #1 - 10/06/10 Name_
1) Event A and Event B occur simultaneously in the lab frame, but a distance L apart along the x-axis. What is the time
interval between the two events as observed from a Rocket frame moving paralle
Physics 215 - Special Relativity - Solutions #7
PHYS215-1) a) Energy and momentum must be
conserved for all of the components of the rocket/fuel
system. The picture at right illustrates the situation
schematically: In the beginning, the rocket with it's
f
PHYS 215 - Special Relativity - Quiz #1 - 09/15/10 Name_
1) Observer A is traveling toward our (the lab) origin from the left at a speed 0.8c. Observer B is traveling toward our origin
from the right, also with a speed 0.8c. At t=0, we emit a light pulse