It focuses visible light.
condenser - lens system that aligns and focuses the light from the lamp onto the specimen diaphragms or pinhole apertures
A telescope uses a mirror to collect and reflect light gathered from celestial objects. The mirror focuses this light to create a magnified image, allowing astronomers to study distant stars, planets, and galaxies with greater clarity and detail.
The condenser is the part of a microscope that has a hole in it to let light through. It focuses and directs light onto the specimen being viewed, helping to illuminate it for observation.
The concave shape focuses the light into a narrow beam. If the mirror was convex, the light would be spread out - useless for searching into any distance.
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.
Lens
lens.
The lens focuses light on the retina.
The biconvex transparent structure that focuses light on the retina is the lens of the eye. It helps to refract light rays and focus them on the retina at the back of the eye, allowing for clear vision.
It focuses visible light.
A lens.
The lens focuses light on the retina (fish have one)
The lens focuses light by bending the light to make it strike the retina in the right angle
The lens focuses light by bending the light to make it strike the retina in the right angle
retina, film, CCD, etc.
lens