1. Visual Spectrum: is the portion of the electromagnetic spectrum that is visible to the human eye.2.Electromagnetic Spectrum: is the characteristic distribution of electromagnetic radiation emitted or absorbed by that particular object.
3. Diaphram: is a thin opaque structure with an opening at its center.
3. Diaphram: is a thin opaque structure with an opening at its center.
4. Camera Obscura: is an instrument consisting of a darkened chamber or box, into which light is admitted through a convex lens, forming an image of external objects on a surface of paper or glass, etc., placed at the focus of the lens.
Aparture: is a hole or an opening through which light travels.
Shutter: is a device that allows light to pass for a determined period of time, for the purpose of exposing photographic film or a light-sensitive electronic sensor to light to capture a permanent image of a scene.
Exposure: is the total amount of light allowed to fall on the photographic medium during the process of taking a photograph.
Depth of field: is the portion of the sene that seems sharp in the image.
F-stop: is how much light is allowed through the lens by varying the area of the hole the light comes through.
Focal strength: is how strong the sharpness of the lens can picture. [Couldn't find an actual definion so gave whatI believe.]
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