convex and concave
A refracting telescope uses two lenses - an objective lens to gather light and focus it and an eyepiece lens to magnify the image.
doubled lenses
there are two types of optical fiber,the first type is single mode fibers.the second type is multimode fibers.
A compound microscope is made up of two or more lenses. These lenses work together to magnify and focus light onto a specimen, allowing for detailed observation of small objects.
On eyeglasses? Two lenses = bifocals Three lenses = Trofocals
A compound microscope has multiple lenses
It depends on the type of reflecting telescope.
Two basic kinds of lenses are converging lenses, which focus light rays to a point, and diverging lenses, which spread out light rays. Converging lenses are thick in the center and thin at the edges, while diverging lenses are thin in the center and thick at the edges.
The two types of lenses are converging lenses (also called convex lenses) and diverging lenses (also called concave lenses). Converging lenses converge light rays to a focal point, while diverging lenses cause light rays to spread out.
There are two types of lenses - fixed focal and zoom lenses.
Carl Zeiss sell a wide range of lenses including: eyeglass lenses, camera lenses, cinematography lenses and also lenses for technical applications which assist scientists and engineers.
Microscopes typically use several types of lenses, including objective lenses to gather light from the specimen and eyepiece lenses to magnify the image. These lenses are made of glass and are usually designed to minimize distortions and aberrations to provide a clear, magnified view of the specimen. Other components, such as condenser lenses and diaphragms, also play a crucial role in focusing and illuminating the specimen.