Difference Between Convex Lens And Concave Lens

The primary difference between convex lens and concave lens is that a convex lens converges light rays and focuses them to a point, while a concave lens diverges light rays, spreading them apart.

What is Convex Lens?

A convex lens is a type of optical lens that is thicker in the center and thinner at the edges. It is also known as a converging lens because it converges or brings together parallel rays of light that pass through it.

Convex lenses are commonly used in various optical devices such as cameras, eyeglasses, microscopes, and telescopes to focus light and form images. They have two principal focal points, one on each side of the lens, where light rays either converge or appear to diverge, depending on the orientation of the lens.

Convex lenses are characterized by their ability to produce both real and virtual images depending on the placement of the object relative to the lens.

What is Concave Lens?

A concave lens is a type of optical lens thinner at the center than at the edges. It is curved inward, causing parallel rays of light to diverge or spread out when they pass through it.

Concave lenses are used to correct nearsightedness (myopia) and are commonly found in glasses and contact lenses to help people see distant objects more clearly by diverging the incoming light before it reaches the eye’s lens.

Convex Lens Vs Concave Lens

The basic difference between a convex lens and a concave lens is given below:

PropertyConvex LensConcave Lens
ShapeThicker in the centre, curved outwardThinner in the centre, curved inward
Focusing BehaviorTypically creates virtual and diminished imagesThicker in the center, curved outward
Principal FocusReal and located on the opposite side of the incident lightVirtual and located on the same side as the incident light
Image FormationCan form both real and virtual images, depending on the object’s positionTypically forms virtual and diminished images
Common ApplicationsMagnifying glasses, cameras, telescopesCorrecting nearsightedness (myopia), correcting certain eye conditions, like presbyopia

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