Electronics (Mike Jaroch) | edulabs.org academy

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I

IONIZATION POINT

The potential required to ionize the gas of a gas-filled tube. Sometimes called
firing potential [6].

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IONIZE

To make an atom or molecule of an element lose an electron, as by X-ray bombardment, and thus be converted into a positive ion. The free electron may attach itself to a neutral atom or molecule to form a negative ion [1].

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IONOSPHERE

The most important region of the atmosphere extending from 31 miles to 250 miles above sea level. Contains four cloud-like layers that affect radio waves [10].

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IONOSPHERIC STORMS

Disturbances in the earth's magnetic field that make communications practical only at lower frequencies [10].

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IRIS

A metal plate with an opening through which electromagnetic waves may pass. Used as an impedance-matching device in waveguides [11].

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ISOLATION

The prevention of unwanted interaction or leakage between components [14].

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ISOMETRIC DIAGRAM

A diagram showing the outline of a ship, aircraft, or equipment and the
location of equipment and cable runs [4].

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ISOTROPIC RADIATION

The radiation of energy equally in all directions [10].

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