Chapter 26 The Refraction of Light: Lenses and Optical Instruments
Chapter 26 The Refraction of Light: Lenses and Optical Instruments
Chapter 26 The Refraction of Light: Lenses and Optical Instruments
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<strong>26</strong>.7 <strong>The</strong> Formation <strong>of</strong> Images by <strong>Lenses</strong><br />
<strong>26</strong>.7 <strong>The</strong> Formation <strong>of</strong> Images by <strong>Lenses</strong><br />
When the object is placed between F <strong>and</strong> 2F, the real image is<br />
inverted <strong>and</strong> larger than the object.<br />
When the object is placed between F <strong>and</strong> the lens, the virtual image is<br />
upright <strong>and</strong> larger than the object.<br />
29<br />
30<br />
<strong>26</strong>.7 <strong>The</strong> Formation <strong>of</strong> Images by <strong>Lenses</strong><br />
<strong>26</strong>.8 <strong>The</strong> Thin-Lens Equation <strong>and</strong> the Magnification Equation<br />
IMAGE FORMATION BY A DIVERGING LENS<br />
A diverging lens always forms an upright, virtual, diminished image.<br />
1<br />
d<br />
o<br />
1<br />
+<br />
d<br />
i<br />
=<br />
1<br />
f<br />
hi<br />
m =<br />
h<br />
o<br />
d<br />
= −<br />
d<br />
i<br />
o<br />
31<br />
32
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