Transcript Comparison Task - Relativistic Clocks

Ch. 35 Special Relativity
Clicker Activities
Answer the following warm up
question about Einstein’s
postulates on your own
sa
>
d
is
th
e
1
ee
4
5
sp
3
e
2
Th
1
m
...
2
3
>
2
1
<
3
<
3
>
2
>
1
5.
<
4.
2
3.
<
2.
1
1<2<3
1>2>3
1<3<2
1>3>2
The speed is the same
for all of the light beams
1.
3
Headlights are turned on 3 trains traveling at
v1 =.1c,v2 = .5 c, and v3 = .7 c. Rank the
speed of the light beams from least to
greatest as seen by observer next to the
track . (TPS)
20% 20% 20% 20% 20%
Consult with your neighbors and
answer again
sa
>
d
is
th
e
1
ee
4
5
sp
3
e
2
Th
1
m
...
2
3
>
2
1
<
3
<
3
>
2
>
1
5.
<
4.
2
3.
<
2.
1
1<2<3
1>2>3
1<3<2
1>3>2
The speed is the same
for all of the light beams
1.
3
Headlights are turned on 3 trains traveling at
v1 =.1c,v2 = .5 c, and v3 = .7 c. Rank the
speed of the light beams from least to
greatest as seen by observer next to the
20% 20% 20% 20% 20%
track . (TPS)
Two clocks will be shown. They
will keep time by sending a
pulse of light back and forth and
counting a tick each time the
pulse returns to its starting point.
View the operation of the clocks
at rest.
http://webphysics.davidson.edu/physlet_resources/special_relativity/default.html
The green clock will move with
respect to the red clock at a
speed of .5 c.
Make the following prediction
on your own
When the green clock moves with
respect to the red clock it will
Keep the same time
as the red clock
Run faster than the
red clock
Run slower than the
red clock
Cannot be
determined
1
2
3
4
5
an
no
t
te
rm
in
ed
be
de
th
a
sl
ow
er
un
R
C
n
th
a
n
th
e
th
e
re
r..
...
a.
..
e
te
r
un
R
K
ee
p
fa
s
th
e
4.
tim
3.
m
e
2.
25% 25% 25% 25%
sa
1.
Consult with your neighbors and
answer again
When the green clock moves with
respect to the red clock it will
Keep the same time
as the red clock
Run faster than the
red clock
Run slower than the
red clock
Cannot be
determined
1
2
3
4
5
an
no
t
te
rm
in
ed
be
de
th
a
sl
ow
er
un
R
C
n
th
a
n
th
e
th
e
re
r..
...
a.
..
e
te
r
un
R
K
ee
p
fa
s
th
e
4.
tim
3.
m
e
2.
25% 25% 25% 25%
sa
1.
The same situation as before
only now the clocks are
oriented in the direction of
travel. Answer the following on
your own.
When the green clock moves with
respect to the red clock it will
Keep the same time
as the red clock
Run faster than the
red clock
Run slower than the
red clock
Cannot be
determined
1
2
3
4
5
an
no
t
te
rm
in
ed
be
de
th
a
sl
ow
er
un
R
C
n
th
a
n
th
e
th
e
re
r..
...
a.
..
e
te
r
un
R
K
ee
p
fa
s
th
e
4.
tim
3.
m
e
2.
25% 25% 25% 25%
sa
1.
Consult with your neighbors and
answer again
When the green clock moves with
respect to the red clock it will
Keep the same time
as the red clock
Run faster than the
red clock
Run slower than the
red clock
Cannot be
determined
1
2
3
4
5
an
no
t
te
rm
in
ed
be
de
th
a
sl
ow
er
un
R
C
n
th
a
n
th
e
th
e
re
r..
...
a.
..
e
te
r
un
R
K
ee
p
fa
s
th
e
4.
tim
3.
m
e
2.
25% 25% 25% 25%
sa
1.