A lens is an optical instrument that, using the concept of refraction, either converges or diverges the light beam that strikes its surface. The converging or diverging of light beams is accomplished using a piece of glass with the proper form. For light rays to refract and form an image, the object must be shaped in this fashion.
The lens’s power is measured by the amount of convergence or divergence it imparts to the light beams that pass through it. We’ll explore how a concave lens differs from a convex lens in this section.
This article will discuss Concave Lens vs Convex Lens, so read on to know more!
- Concave lenses are described as lenses that have a curving surface on their surface in physics.
- On the interior of the cover, the corners are curled inwards. A concave lens is a divergent lens that splits the light beam in multiple directions.
- A concave lens is a narrow lens that people with short-sightedness wear.
- Biconcave lenses and plano concave lenses are the two main types of concave lenses.
- Spectacles, cameras, lasers, flashlights, and other devices use concave lenses.
- A concave lens reduces the size of an object’s picture. Because it creates virtual representations of things, the concave lens is termed a diverging lens.
- A convex lens is an optical lens that is made up of two curved/spherical surfaces.
- A biconvex lens is defined as one that is turned outward.
- Through the convex lens, the rays converge and fall in a parallel direction.
- Instead of being curled inwards, the surface is covered outwards.
- Eyeglasses, magnifying glasses, microscopes, cameras (to capture an image from a distance), and other devices use convex lenses. 1/f = 1/v plus 1/u is the formula for the convex lens.
- Thus, the focal length is ‘f,’ the distance from where the picture is created is ‘v,’ and the distance between the lens and the object is ‘u.’
- Plano-convex lenses, double convex lenses, and concave-convex lenses are the three main types of convex lenses.
Concave Lenses are available in a variety of shapes and sizes
- Biconcave Lens:A biconcave lens is a surface that has a concave lens on both sides. The diverging lens is a biconcave lens, which means the light beam is reflected in diverse directions.
- Plano-Concave Lens:A plano-concave lens has one flat surface, and the other is concave. These lenses are used for light projection, beam expansion, and other purposes.
- Negative Meniscus:A negative meniscus is a diverging lens with one convex edge and one concave edge.
Convex Lenses Come in a Variety of Shapes and Sizes
- Biconvex Lens:A biconvex lens has both convex surfaces. Converging lenses are biconvex lenses.
- Plano-Convex Lens:A plano-convex lens has one plane surface and one convex surface. Light beams are focused, collected, and converged in a parallel path using plano-convex lenses.
Concave and convex lenses are utilised in several conditions.
Uses of Convex Lens
Magnifying the image
A convex lens is utilised to magnify and enhance the size of the image created. If you move the object closer to the focal point on one side of the lens, you’ll find that the picture is created on the same side of the thing but magnified exceedingly. The resulting image is virtual, upright, and expanded. This type of lens is used in magnifying glasses to view larger images of microscopic objects.
Treatment of Hypermetropia
Doctors recommend eyeglasses when the eyes’ natural lens fails to focus the light of things on the retina appropriately. However, the condition of nearsightedness or farsightedness can be corrected with the right lenses. Farsightedness, also known as Hypermetropia, can be treated with a convex lens.
The focal point is allowed to land on the retina of the eyes because the light rays are reduced by bending them. This shortens the focal length and improves the person’s ability to see distant objects.
Uses of Concave Lens
They are used to treat nearsightedness
When a person has nearsightedness or myopia, it is recommended that they get eyeglasses with concave lenses, which diverge the light beam and remedy the problem. In addition, however, it is possible to obtain the focal point on the retina and view near things by wearing glasses.
Used in Torches and Flashlights
The flashlight lens is a concave lens that is put in the path of the light beam and diverges the rays so that the beam of light is distributed over a vast surface in darkness, and one can see objects even in darkness. In addition, the beam’s diameter has been increased, and it now covers a greater area, allowing for better item visibility.
Difference between concave and convex mirrors
- Constantly bulging towards the light source, a convex mirror is a diverging mirror with a reflecting surface that bulges outward. Because they reflect light outwards, they are not utilised to concentrate light.
- Convex mirrors have a reflecting surface that is curved inward and away from the light source, and the image generated by them is smaller than the object as it approaches the mirror.
- On the other hand, Concave mirrors have a reflective surface that is curved inward and away from the light source.
- Concave mirrors are used to direct light inward into a single focal point. In contrast to convex mirrors, the image created by a concave mirror exhibits a variety of picture types depending on the distance between the item and the mirror.
- Concave mirrors are used in a variety of applications, including flashlights and automotive headlights. In addition, convex mirrors include magnifying glasses and telescopes, to name a few examples.
- Concave mirrors are spherical mirrors that have a reflecting surface on their inner side. Convex mirrors are spherical mirrors that have a reflective surface on their outer edge.
- Keeping an object in front of a concave mirror results in an enlarged image of the item. This is when the object is maintained near the mirror, and an inverted picture of the object is kept at a distance from the mirror. Thus, a convex mirror always produces a tiny and erect picture of the thing it is reflecting.
We hope you understood the topic, which we discussed in detail in this article. If you have any related questions regarding this concept, drop them in the comment section provided.