How do we use lenses?

How do we use lenses?

Concave Lens is used:

✔️ to correct myopia eye defects 

✔️ to make spectacles 

✔️ in peepholes in hotel room doors.

✔️ in the construction of certain types of telescopes.

Convex Lens is used:

✔️ to correct hypermetropia eye defects 

✔️ in cameras and digital cameras as optical devices for producing a reduced, true, and inverted image on film.

✔️ in microscopes and telescopes 

✔️ to produce a magnified image of an object.

Subtypes of convex lens are: 

📌 A bi-convex lens is a basic lens that consists of two convex surfaces in a spherical form with the same radius of curvature. 

📌 Plano-convex lenses are positive focal length elements that have one spherical surface and one flat surface

📌 ConConvex lenses are also known as converging lenses since the rays converge after falling on the convex lens. 

Subtypes of concave lenses are: 

📌 A bi-concave lens have two inward curved surfaces. These lenses have a negative focal length. 

📌 A plano-concave lens is an optical lens with one concave surface and one flat surface. It has a negative focal length and can be used for light projection, beam expansion, or to increase the focal length of an optical system.

📌 A concavo-convex lens is a converging lens. This is because it is thicker in the middle and thinner at the edges allowing it to converge all the light that is incident on it.

ℹ️‼️👀 The lens of our eyes is also convex. The inverted image of the item on the retina is formed by the eye lens.

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