Art

Art Aperture An Apple application for Macintosh computers. The Aperture application is used by many professional photographers in post-production work. camera obscura The camera obscura (Latin; "camera" is a "vaulted chamber/room" + "obscura" means "dark"= "darkened chamber/room") is an optical device that projects an image of its surroundings on a screen. It is used in drawing and for entertainment, and was one of the inventions that led to photography. The device consists of a box or room with a hole in one side. Light from an external scene passes through the hole and strikes a surface inside where it is reproduced, upside-down, but with colour and perspective preserved. The image can be projected onto paper, and can then be traced to produce a highly accurate representation. Using mirrors, as in the 18th century overhead version (illustrated in the Discovery and Origins section below), it is possible to project a right-side-up image. Another more portable type is a box with an angled mirror projecting onto tracing paper placed on the glass top, the image being upright as viewed from the back. As a pinhole is made smaller, the image gets sharper, but the projected image becomes dimmer. With too small a pinhole the sharpness again becomes worse due to diffraction. Some practical camera obscuras use a lens rather than a pinhole because it allows a larger aperture, giving a usable brightness while maintaining focus. (See pinhole camera for construction information.) contact print noun a photographic print made by placing a negative directly onto sensitized paper, glass, or film and illuminating it.

developer noun a person or thing that develops something : a property developer | software developers. • [with adj. ] a person who grows or matures at a specified time or rate : I was a slow developer. a chemical agent used for treating photographic film to make a visible image.

exposure the quantity of light or other radiation reaching a photographic film, as determined by shutter speed and lens aperture.

fixer a substance used for fixing a photographic image.

photogram noun a picture produced with photographic materials, such as light-sensitive paper, but without a camera. archaic a photograph.

photosensitive adjective having a chemical, electrical, or other response to light : photosensitive cells | photosensitive drugs.

pointillism noun a technique of neo-Impressionist painting using tiny dots of various pure colors, which become blended in the viewer's eye. It was developed by Seurat with the aim of producing a greater degree of luminosity and brilliance of color.

positive (of a photographic image) showing lights and shades or colors true to the original.

shutter Photography a device that opens and closes to expose the film in a camera.

texture noun the feel, appearance, or consistency of a surface or a substance : skin texture and tone | the cheese is firm in texture | the different colors and textures of bark. • the character or appearance of a textile fabric as determined by the arrangement and thickness of its threads : a dark shirt of rough texture. • Art the tactile quality of the surface of a work of art. the quality created by the combination of the different elements in a work of music or litera

transparency an image, text, or positive transparent photograph printed on transparent plastic or glass, able to be viewed using a projector.

art colour theory test

name the primary colurs - red, blue and yellow

what are two characteristics that are specific to primary colours - primary colour make all other colour hues, no other colours can be mixed to make a primary

how do you make a secondary colour - mix primary colour p+p=s

name the secondary colours - green violet and orange