Concave lens.
A microscope uses an objective lens and an eyepiece lens to magnify tiny objects for closer examination. The objective lens gathers light from the specimen and forms an enlarged image, which is further magnified by the eyepiece lens for viewing.
A compound microscope uses both an objective lens and an eyepiece lens. The objective lens is located near the specimen and provides initial magnification, while the eyepiece lens further magnifies the image for viewing. This combination allows for detailed observation of small objects and biological specimens.
A radio telescope is a reflecting telescope, and uses a mirror rather than a lens. Since radio waves are so much longer than light waves, the 'mirror' of a radio telescope is the 'dish' reflector that focuses radio waves onto its antenna, located at the prime focus of the dish.
The lens you look through in a telescope, binocular, or microscope is called the eyepiece. It is the lens closest to your eye that magnifies the image produced by the objective lens.
Practically all telescopes which use lenses, normally the refracting type. the Reflector use objective Concave Mirrors, but even these need eyepieces or finder scopes.
ocular lens
A reflecting telescope only uses lenses in the eyepiece. Light is picked up and an image produced by using a concave parabolic mirror.
The Hubble Space telescope is a reflecting Telecope
A microscope uses an objective lens and an eyepiece lens to magnify tiny objects for closer examination. The objective lens gathers light from the specimen and forms an enlarged image, which is further magnified by the eyepiece lens for viewing.
A radio telescope is a reflecting telescope, and uses a mirror rather than a lens. Since radio waves are so much longer than light waves, the 'mirror' of a radio telescope is the 'dish' reflector that focuses radio waves onto its antenna, located at the prime focus of the dish.
They use a mirror instead of a lens to focus light into the eyepiece. Newtonian telescopes are the most common type. Schmidt-Cassegrain is also a popular design but more complex and expensive.
Ocular lens is a type of eyepiece that is attached to a variety of optical devices such as telescopes and microscopes.
The lens you look through in a telescope, binocular, or microscope is called the eyepiece. It is the lens closest to your eye that magnifies the image produced by the objective lens.
A refracting telescope uses two lenses - an objective lens to gather light and focus it and an eyepiece lens to magnify the image.
A compound microscope is made up of two or more lenses in its optical system. The objective lens magnifies the specimen, and the eyepiece lens further magnifies the image produced by the objective lens. This combination of lenses allows for higher magnification and resolution compared to simple microscopes.
A light microscope uses a combination of convex lenses, including objective lenses and eyepiece lenses, to magnify and focus light passing through the specimen. The objective lens is closer to the specimen and creates the initial magnified image, while the eyepiece lens further magnifies the image for viewing by the observer.
Practically all telescopes which use lenses, normally the refracting type. the Reflector use objective Concave Mirrors, but even these need eyepieces or finder scopes.