Juxtaposition: Juxtaposition is the placement of two things (usually abstract concepts, though it can refer to physical objects) near each other.
Geometric Shapes vs.Organic Shapes: Organic shapes are shapes with a natural look and a flowing and curving appearance. For this reason, they are often also referred to as curvilinear shapes.
Rule of Thirds: The rule of thirds is a compositional rule of thumb in visual arts such as painting, photography and design. The rule states that an image should be imagined as divided into nine equal parts by two equally-spaced horizontal lines and two equally-spaced vertical lines, and that important compositional elements should be placed along these lines or their intersections.
Aperture: In optics, an aperture is a hole or an opening through which light travels. More specifically, the aperture of an optical system is the opening that determines the cone angle of a bundle of rays that come to a focus in the image plane.
Shutter Speed: In photography, shutter speed is a common term used to discuss exposure time, the effective length of time a camera's shutter is open. The total exposure is proportional to this exposure time, or duration of light reaching the film or image sensor.
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