Diverging lens
A concave lens is otherwise known as a diverging lens.
A convex lens is also known as a converging lens, while a concave lens is also known as a diverging lens.
Concave and convex can refer the types of lenses used to treat refractive errors in the eyes. Concave is another word for myopic lens and convex is another name for a hyperopic lens also known as nearsighted and farsighted respectively
A diverging lens, also known as a concave lens, always forms virtual images. This type of lens diverges incoming light rays, causing them to appear to originate from a point behind the lens, resulting in the formation of a virtual image.
A converging lens is also known as a convex lens.
There is no other name for the objective lens. However, the eyepiece is also called the ocular lens.
Another name is eyepiece or eyepiece lens.
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If light is incident of a convex lens, light will meet at the focal point, on the other side of the lens. In case of concave lens, light will be diverged. Convex and concave lens are very important in study of optics.
Bifocals.
Another name for a camera lens is an "optical lens." It is designed to focus light onto the camera's sensor or film, enabling the capture of images. Depending on its specific function, it may also be referred to as a "glass" or "objective lens."