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well scientifically, an eyepiece is a part of the electron microscope used in viewing objects. it is made up of both plastic for support and the glass for the lens which is used for viewing the objects.
A magnify glass
i think a microscope or a elctronmicroscope
People see objects - because light is reflected back to the person viewing.
when viewing objects under high-power, the field of view is smaller, but you are able to see more details.
when viewing objects under high-power, the field of view is smaller, but you are able to see more details.
when viewing objects under high-power, the field of view is smaller, but you are able to see more details.
The mirror is slightly convex (domed outward). This gives the mirror a larger viewing area. The trade-off for this larger viewing area is that objects seem smaller. One way to think about it is that you are viewing more stuff in the same size mirror. To fit more stuff in your view, the stuff you are viewing must be smaller.
viewing objects too small to be seen with visible light.
physical objects
David Viewing has written: 'The use of analytical instruments in the search for extra-terrestrial spacecraft' -- subject(s): Unidentified flying objects
A light microphone is not a viewing device. Microphones are for picking up sound.