Lesson 1/Learning Event 5
Figure 1-14.
Positive lenses
b. Negative lenses are concave on one or both sides and bend light rays
away from its center (fig 1-15).
Figure 1-15.
Negative lenses
4. A simple rule of thumb which can be used in determining the category of
any single lens is that .light rays always bend towards the thickest part of
a lens.
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