The list of choices you included with your question doesn't include any part of a
telescope that can do that. I would have picked the objective, whether a lens or
a mirror.
Lens refracts light
mirror
The main lens or mirror produces a virtual image of the obect being looked at, and it occurs at a distance behind the lens (or in front of the mirror) equal to the focal length. The telescope also has an eyepiece whose function is to allow the oberver to see the virtual image. Many telescopes come with a range of different eyepieces that give different amounts of magnification.
The lens.
Telescope eyepieces are important of any visual telescope. It is the main part of the telescope and is what determines how the object will look like through the telescope.
A refracting or refractor telescope is a dioptric telescope that uses a lens as its objective to form an image. The refracting telescope design was originally used in spy glasses and astronomical telescopes but is also used in other devices such as binoculars and long or telephoto camera lenses.There are two basic types of telescopes, refractors and reflectors. The part of the telescope that gathers the light, called the objective, determines the type of telescope. A refractor telescope uses a glass lens as its objective. The glass lens is at the front of the telescope and light is bent (refracted) as it passes through the lens. A reflectortelescope uses a mirror as its objective. The mirror is close to the rear of the telescope and light is bounced off (reflected) as it strikes the mirror
Cornea: Transmits & focuses light into the eye. Lens: Focuses light rays onto the retina. Retina: Creates impulses to the brain. Thepupil is a hole located in the center of the iris of the eye that allows light to enter the retina.
An optical telescope focuses and concentrates visible light; radio telescopes focus and concentrate electromagnetic radiation (which means, "light") in the radio part of the spectrum.
An optical telescope is a telescope that gathers and focuses light, mainly from the visible part of the electromagnetic spectrumcreate a magnified image for direct view, making a photograph, or collecting data through electronic image sensors.
The main lens or mirror produces a virtual image of the obect being looked at, and it occurs at a distance behind the lens (or in front of the mirror) equal to the focal length. The telescope also has an eyepiece whose function is to allow the oberver to see the virtual image. Many telescopes come with a range of different eyepieces that give different amounts of magnification.
The lens.
A parabolic mirror best focuses light onto a spot. Or a convex lens will do similar. In the eye, the lens towards the front of the eye focuses light onto the retina, where the light sensitive cells lie.
We only see things when light reflects from an object and enters our eyes. The human eye is only sensitive to certain types of light - we cannot see ultra violet light or infra red radiation. The human eye consists of 7 main parts: Lens: Focuses the light on the back of the retina by concentrating the light Retina: Sends messages to the brain to tell you what you are seeing - converts light into vision Pupil: Controls how much light enters the eye Cornea: - Protects the eye. - Controls and focuses incoming light Iris: (The colored part of the eye) Contracts and expands to regulate the amount of light that enters the eye. Optic Fiber: Carries electrical impulses (converted rays) from the eye to the brain. Conjunctiva: Its cell produces mucous with helps lubricate the eye. All types of eyes work in the same basic way; they all detect light and convert it to electrical signal and transmits them to the brain to be seen as images.
Telescope eyepieces are important of any visual telescope. It is the main part of the telescope and is what determines how the object will look like through the telescope.
condenser - lens system that aligns and focuses the light from the lamp onto the specimen diaphragms or pinhole apertures
A refracting or refractor telescope is a dioptric telescope that uses a lens as its objective to form an image. The refracting telescope design was originally used in spy glasses and astronomical telescopes but is also used in other devices such as binoculars and long or telephoto camera lenses.There are two basic types of telescopes, refractors and reflectors. The part of the telescope that gathers the light, called the objective, determines the type of telescope. A refractor telescope uses a glass lens as its objective. The glass lens is at the front of the telescope and light is bent (refracted) as it passes through the lens. A reflectortelescope uses a mirror as its objective. The mirror is close to the rear of the telescope and light is bounced off (reflected) as it strikes the mirror
Cornea: Transmits & focuses light into the eye. Lens: Focuses light rays onto the retina. Retina: Creates impulses to the brain. Thepupil is a hole located in the center of the iris of the eye that allows light to enter the retina.
help meAnother AnswerInfrared
The pupil goes larger in the dark, and smaller in the light.