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Optics. Mirrors and lenses are the critical light-bending components of a telescope. Objective: The first lens or curved mirror that collects and focuses the incoming light. Primary lens: The objective of a refracting telescope. Primary mirror: The objective of a reflecting telescope. Corrector plate: A full aperture negative lens placed before ...
A block diagram is a diagram of a system in which the principal parts or functions are represented by blocks connected by lines that show the relationships of the blocks. [ 1] They are heavily used in engineering in hardware design, electronic design, software design, and process flow diagrams . Block diagrams are typically used for higher ...
The [main] field of the drawing, as opposed to other areas of it, such as the parts list , general notes (G/N), flagnotes , title block , rev block , bill of materials (B/M or BoM or BOM), or list of materials . Rationales for drawing changes that are noted in the rev block often use these abbreviations for brevity (e.g., "DIM 14.00 was 12.50 ...
p–n junction. Pin configuration. A: Anode, K: Cathode. Electronic symbol. A p–n diode is a type of semiconductor diode based upon the p–n junction. The diode conducts current in only one direction, and it is made by joining a p -type semiconducting layer to an n -type semiconducting layer.
Block on a ramp and corresponding free body diagram of the block. In physics and engineering, a free body diagram ( FBD; also called a force diagram) [1] is a graphical illustration used to visualize the applied forces, moments, and resulting reactions on a body in a given condition. It depicts a body or connected bodies with all the applied ...
An organizational chart, also called organigram, organogram, or organizational breakdown structure ( OBS ), is a diagram that shows the structure of an organization and the relationships and relative ranks of its parts and positions/jobs. The term is also used for similar diagrams, for example ones showing the different elements of a field of ...
Product breakdown structure. In project management under the PRINCE2 methodology, a product breakdown structure ( PBS) is a tool for analysing, documenting and communicating the outcomes of a project, and forms part of the product based planning technique. The PBS provides "an exhaustive, hierarchical tree structure of deliverables that make up ...
Phil Vassar is opening up about experiencing a heart attack and stroke which he says caused him to die twice. In a new interview with Taste of Country published on Thursday, Aug. 8, Vassar, 62 ...