Page 1 - Lesson note refraction by convex lens

SAI INTERNATIONAL SCHOOL
PHYSICS
CLASS X
Chapter: LIGHT(REFLECTION & REFRACTION)
MODULE-30

LESSON NOTES: refraction through convex lens

Refraction by Spherical Lenses
o A Spherical lens is a piece of transparent glass bound by two spherical
surfaces.
o There are two types of Spherical Lenses
1. A convex lens bulges outward and is thick at the center and
thinner at the edges. Convex lens converges the light rays as
shown below in the figure 1(a).

Hence convex lenses are called converging lenses.
2. A concave lens bulges inward and is thinner in the middle and
thicker at the edges. Such lenses diverge light rays as shown in
Figure 1(b)

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