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Increasing the distance between the object and the mirror causes the object’s size to increase until it reaches its original size. A concave mirror is characterised by a reflecting surface that is recessed inwards. The mirror also converges the light to a single point of focus, which is why they are also referred to as converging mirrors. They are used to focus light on a specific area. The size of the image formed by the concave mirror varies depending on where the object is placed in relation to the mirror and how far away it is from the mirror.
Concave Mirror
A concave mirror, also known as a converging mirror, is a reflecting surface that has been recessed inward from the surface of the object being reflected (away from the incident light). The concave mirror has the ability to reflect light inward to a single focal point. They are employed for the purpose of concentrating light. The type of image produced by a concave mirror is determined by the distance between the object and the mirror.
Characteristics of Concave Mirrors
When light strikes the concave mirror, it converges at a single point and reflects back from the reflecting surface of the concave mirror. As a result, it is also referred to as a converging mirror.
Using a concave mirror that is placed very close to the object, it is possible to obtain a magnified and virtual image.
In contrast, if the distance between the object and the mirror is increased, the size of the image shrinks and a real image is formed.
The image formed by the concave mirror can be small or large, real or virtual.
What is the best way to determine the focal length of a concave mirror?
The following are the various methods for determining the focal length of a concave mirror:
Generally speaking, a concave mirror is a spherical mirror with a reflecting surface that is curved inwards and that follows the laws of reflection of light.
The light rays emitted by a distant object can be considered to be parallel to one another in their paths.
Alternatively, if the image formed is real, inverted, and very small in size, the parallel rays of light will meet at a point in front of the mirror.
The image formed by the convex lens is real, and it can be viewed on a computer screen if desired.
In the concave mirror, the letter f is used to denote the difference in length between the principal axis P and the focus F.
Convex Lens
When it comes to lenses, convex lenses are thicker in the centre and thinner at the edges, and they are used to magnify objects. An optical lens is constructed from two spherical surfaces, which, when bent outwards, are referred to as a convex lens. These types of lenses are used to condense a beam of light and focus it on a point on the other side, which is known as focusing. The Focal Length of a convex lens is the distance between the centre of the lens and the point at which parallel rays converge.
Characteristics of Convex Lens
A convex lens is thicker in the middle and thinner at the edges, with the middle being thicker and the edges being thinner.
It is also referred to as the Converging Lens.
Used in a camera, focusing sunlight, overhead projectors, projector microscopes, simple telescopes, magnifying glasses, and other devices, among other things. It can also be used to correct a problem that is visible in the long term.
Positive Focal Length
It directs the incident rays in the direction of the principal axis.
When the object is brought into focus, the image that is formed is inverted, real, and smaller than the object itself. When the object is placed at 2F, the image that is formed is inverted, real, and the same size as the original object. When an object is placed between 2F and F, the image that is formed is inverted, real, and larger than the object that is being represented.
When the object is brought into focus, there is no image formed (F). When the object is placed on the same side of the lens, the image that is formed is upright, virtual, and larger than the object.
What is the best way to determine the focal length of a convex lens?
The following are the various methods for determining the focal length of a convex lens:
The convex lens, also known as the converging lens, is characterised by being thicker in the middle and thinner at the edges.
After passing through the convex lens, the refracted light rays from the parallel beam of light converge on the other side of the lens.
If the image is obtained at the focal point of the lens, the image would be real, inverted, and very small in comparison to the background.
The focal length, denoted by the letter f, is the distance between the optical centre of the lens and the point of primary focus.
Because the image formed by the lens is real, it is possible to obtain an image on a computer screen.
Conclusion
A concave mirror is characterised by a reflecting surface that is recessed inwards. The mirror also converges the light to a single point of focus, which is why they are also referred to as converging mirrors. They are used to focus light on a specific area. The size of the image formed by the concave mirror varies depending on where the object is placed in relation to the mirror and how far away it is from the mirror. A convex mirror is a curved mirror in which the reflective surface bulges out towards the light source and is curved in a clockwise direction. Due to the fact that the convex mirror reflects light outwards, it is not used to concentrate light. Increasing the distance between the object and the mirror causes the object’s size to increase until it reaches its original size.
