Optical!!
In the defence of Syracuse, he used parabolic mirrors to focus the sun's rays into a column of heat directed at approaching wooden warships of the Roman fleet, setting them on fire.
A simple microscope an electron microscope is one that uses the focus of electron beams instead of regular light from lenses. It allowed scientists to discover new germ cells, bacteria, and eventually viruses. the simple microscope was invented in 1600s
Picasso's focus in art is absract.
The focus on small rural communities in pre-industrial Britain was the basis for mob football. It was used as a way for the people to gather, celebrate, and just have some communal fun. The Industrial Revolution led to extensive flight from these communities to the city and devalued the importance of mob football.
prohibition focus was stopping the legality of alcohol consumption.
the reflecting telescope uses mirrors and lenses. The refracting telescope does not include the mirrors.
the reflecting telescope uses mirrors and lenses. The refracting telescope does not include the mirrors.
optical telescope
The Hubble Telescope uses both mirrors and lenses to focus on images.
Newtonian telescope
Refracting telescope.
Refracting Telescope.
Telescopes use lenses or mirrors to collect and focus light from distant objects. The lenses or mirrors help to magnify the light and form an image that can be viewed by the observer.
The Hubble Space Telescope uses mirrors to gather and focus incoming light. The primary mirror is 2.4 meters in diameter and collects light from celestial objects to produce high-resolution images. Mirrors are well-suited for space telescopes as they are more durable and easier to shape to precise specifications compared to lenses.
A telescope uses lens and mirrors to collect and focus light from distant object.
That device is a telescope.
A refracting telescope uses lenses to gather and focus light, while a reflecting telescope uses mirrors. Reflecting telescopes are often preferred for large astronomical telescopes because mirrors can be made larger and more easily than lenses.