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line of sight |
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An unobstructed view from transmitter to receiver. Satellite, infrared (IR) and microwave transmissions require line of sight between nodes, whereas portable phones, cellphones and wireless LANs (Wi-Fi) do not. Bar code systems must also have line of sight between the scanner and the printed bar codes on items. Contrast with RF. |
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? Mentioned in | ? References in classic literature | |
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Silent, and out of his line of sight in the kitchen, she frightened him. |
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line of sight
