Science Lesson Plan
Physics Lesson Plan On spherical lenses, spherical lenses meaning, types of spherical lens, spherical lens is used forspherical mirrors and lenses, refraction examples, S.I unit, use of spherical lens , for grade 9 and 10 for teachers teaching in CBSE And NCERT Based schools in English Medium.
Physics Lesson Plan spherical lenses meaning
A piece of a transparent medium bounded by at least one spherical surface, is called a spherical lens.
An optical lens is made of transparent material such as glass or clear plastic. One or both surfaces usually have a spherical curve.
There are two types of lenses, converging and diverging lenses.
A converging lens is called a convex lens. It is thicker at the centre than at the edges.
A diverging lens is called a concave lens. It is thinner at the centre than at the edges.
Physics Lesson Plan on convex spherical lens
Convex or Converging Lenses: These are thick in the middle and thin at the edges.
Three types of convex lenses
(a) Double Convex Lens: It has both the surfaces convex.
(b) Plano–Convex Lens: It has one surface plane and the other surface convex.
(c) Concavo–Convex Lens: It has one surface concave and the other surface convex.
Physics Lesson Plan on concave spherical lens
Concave or Diverging Lenses: These are thin in the middle and thick at the edges.
Three types of concave lenses
(a) Double Concave Lens: It has both the surfaces concave.
(b) Plano–Concave Lens: It has one surface plane and the other surface concave.
(c) Convexo–Concave Lens: It has one surface convex and the other surface concave.
Physics Lesson Plan on concave and convex spherical lens uses
Concave: A concave lens is used to diverge incident rays. This helps to create a virtual image on the opposite side of the refracting surface. Hence, these lenses are used in binoculars, telescopes, cameras, flashlights and eyeglasses.
Convex: Convex lenses are used in microscopes, magnifying glasses and eyeglasses. They are also used in the cameras to create real images of objects present at a distance.
Physics Lesson Plan on Difference concave and convex spherical lens
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