Biomedical Engineering Reference
In-Depth Information
′
=
7. (a)
L
L
+
F
′
=
⎛
⎝
1.00
⎞
⎠
L
+ (+
10.00 D)
−
0.050 m
′
=
−
L
10.00 D
n
′
′
=
L
′
l
1.52
l
=
−
10.00 D
′
′
=
−
l
0.152 m or
−
15.2 cm
L
L
M
=
′
−
20.00 D
M
=
−
10.00 D
M
×
(10.00 mm)(
=
+
2.00
+
2.00
×
)
=
+
20.00 mm
(b) Virtual.
(c) Erect.
8. Since the image is virtual, it must be located to the left of the surface.
L
′
=
L
+
F
1.52
0.05 m
=
L
+
15.00 D
−
=
−
L
45.40 D
n
l
=
L
1.00
l
=
−
45.40 D
=
−
l
0.022 m or
−
2.2 cm
9. Since the image is real, it must be located to the right of the surface.
L
′
=
L
+
F
1.52
0.20 m
=
L
+
15.00 D
+
L
=
−
7.40 D
n
l
=
L
1.00
l
=
−
7.40 D
=
−
l
0.135 m or
−
13.5 cm
