Biomedical Engineering Reference
In-Depth Information
n
f
′
(c)
F
=
(100)(1.52)
f
−
2.60 D
=
′
′
f
=
−58
.46 cm
F
′
is located 58.46 cm to the left of the surface.
3. (a) Positive
(b) Negative
(c) Positive
(d) Negative
n
f
′
4. (a)
F
=
(100)(1.52)
f
−
10.00 D
=
′
′
f
=
−15
.2 cm
F
′
is 15.2 cm to the left of the diverging surface.
n
f
F
= −
−
(100)(1.00)
f
−
10.00 D
=
′
f
=
+10
.0 cm
F
is 10.0 cm to the right of the diverging surface.
n
−
n
′
F
=
r
1.52
−
1.00
−
10.00
=
r
r
=
−
0.052 m or
−
5.2 cm
The center of curvature is 5.2 cm to the left of the surface.
(b) The image distance is about 7.2 cm to the left of the surface. The image
height is about 1.6 cm.
(c) The magnification is
.
(d) The image is erect. Because it is formed by diverging light rays, it is virtual.
The image can be seen, but cannot be focused on a screen.
+
1.6 cm/
+
3.0 cm
≈
+
0.5
×
