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PHY 126 Final Exam
Problem 1 (6+6+6+6+6 points)
(a) (6 points)
F
F
image of arrow
by mirror
final image 2
20.0 cm
85.0 cm
20.0 cm
lens.
the
of
right
the
to
cm,
)
0
.
86
(
0
.
43
'
cm
)
0
.
64
(
0
.
32
1
'
1
cm
(250)
0
.
125
1
1
'
1
1
from
obtained
is
'
distance
image
final
The
lens.
the
of
object
the
becomes
it
Then
lens.
the
of
left
the
to
cm
(250)
125
85.0(170)
40.0(80.0)
formed
is
mirror
by the
image
The
points)
(6
A(B)
(b)
=
→
=
+
→
=
+
=
+
s
s
f
s
s
s
(3 points for the mirror image, 3 points for the final image)
40.0 cm 40.0 cm
170.0 cm
A
B
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View Full Document(c) Real (3 point) and inverted (3 point).
(d)
cm/s.
0)
0.200(0.45
is
image
final
the
of
speed
the
Therefore
sec.
2.00
in
cm
42.6(85.1)
to
cm
(86.0)
43.0
from
cm
0)
0.400(0.90
of
distance
a
moves
image
final
The
cm.
2.00(4.00)
by
move
to
sec
2.00
it takes
cm/s,
(2.00)
1.00
of
speed
a
at
moving
is
mirror
the
Since
lens.
the
of
right
the
to
cm,
)
1
.
85
(
6
.
42
'
cm
)
0
.
64
(
0
.
32
1
'
1
cm
)
258
(
129
1
1
'
1
1
from
obtained
is
'
distance
image
final
The
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 Summer '08
 Staff
 Physics

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