Biomedical Engineering Reference
In-Depth Information
(1000)(1.000)
l
=
−
327.59 D
′
′
=
−
l
3.05 mm
When you look into someone's eye, you see a virtual image of the pupil that is
located nearer to the cornea (3.05 mm) than the actual pupil (3.60 mm).
L
L
12.
M
=
′
−
370.28 D
M
=
−
327.59 D
×
(4.00 mm)(
M
=
+
1.13
+
1.13
×
)
=
+
4.52 mm
The (virtual) image of the pupil that you see when looking into the eye is larger
than the actual pupil.
CHAPTER 4
Thin Lenses
(
n
−
n
)
′
1. (a)
F
1
=
r
(1.52
−
1.00)
F
1
=
+
0.08
F
1
=
+
6.50 D
(
n
−
n
)
′
F
2
=
r
(1.00
−
1.52)
F
2
=
−
0.06 m
F
2
=
+
8.67 D
For a thin lens:
F
T
=
F
1
+
F
2
F
T
=
+
6.50 D
+
8.67 D
F
T
=
+
15.17 D
1.00
f
(b)
F
=
′
(100)(1.00)
15.17 D
=
′
f
′
f
=
+
6.59 cm
