Geometrical Optics and Image Formation (4D)
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QUESTION
Identify the refracted direction: light goes from
n
1
=
1.0
n_1=1.0
n
1
=
1.0
to
n
2
=
1.5
n_2=1.5
n
2
=
1.5
; does it bend toward or away from the normal?
QUESTION
Find magnification
m
m
m
if
d
o
=
30
cm
d_o=30\,\text{cm}
d
o
=
30
cm
and
d
i
=
15
cm
d_i=15\,\text{cm}
d
i
=
15
cm
for a thin lens.
QUESTION
Find
d
i
d_i
d
i
for a lens with
f
=
10
cm
f=10\,\text{cm}
f
=
10
cm
and
d
o
=
30
cm
d_o=30\,\text{cm}
d
o
=
30
cm
using
1
f
=
1
d
o
+
1
d
i
\frac{1}{f}=\frac{1}{d_o}+\frac{1}{d_i}
f
1
=
d
o
1
+
d
i
1
.
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ANSWER
d
i
=
15
cm
d_i=15\,\text{cm}
d
i
=
15
cm
. Thin lens equation yields positive image distance for converging lens with object beyond focal point.
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