isotropic table - definition. What is isotropic table
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THEORETICAL POINT SOURCE WHICH RADIATES ELECTROMAGNETIC OR SOUND WAVES AT THE SAME INTENSITY IN ALL DIRECTIONS
Isotropic antenna; Isotropic antennas
  • Diagram of antenna and resistor in cavity
  • Animated diagram of waves from an isotropic radiator ''(red dot)''.  As they travel away from the source, the waves decrease in amplitude by the inverse of distance <math>1/r</math> and in power by the inverse square of distance <math>1/r^2</math>, shown by the declining contrast of the wavefronts. This diagram only shows the waves in one plane through the source; an isotropic source actually radiates in all three dimensions.
  • A depiction of an isotropic radiator of sound, published in ''[[Popular Science Monthly]]'' in 1878. Note how the rings are even and of the same width all the way around each circle, though they fade as they move away from the source.

Isotropic radiator         
An isotropic radiator is a theoretical point source of electromagnetic or sound waves which radiates the same intensity of radiation in all directions. It has no preferred direction of radiation.
Table Alphabeticall         
  • The title page of the third edition of ''Table Alphabeticall''.
ENGLISH DICTIONARY PUBLISHED IN 1604
A Table Alphabeticall; Table alphabeticall; Table Alphabetical
A Table Alphabeticall is the abbreviated title of the first monolingual dictionary in the English language, created by Robert Cawdrey and first published in London in 1604.
Table (database)         
SET OF DATA ELEMENTS ARRANGED IN ROWS AND COLUMNS AS PART OF A DATABASE
Database table; Database Tables; Cell (database); Table (SQL); SQL table; Base table
A table is a collection of related data held in a table format within a database. It consists of columns and rows.

ويكيبيديا

Isotropic radiator

An isotropic radiator is a theoretical point source of electromagnetic or sound waves which radiates the same intensity of radiation in all directions. It has no preferred direction of radiation. It radiates uniformly in all directions over a sphere centred on the source. Isotropic radiators are used as reference radiators with which other sources are compared, for example in determining the gain of antennas. A coherent isotropic radiator of electromagnetic waves is theoretically impossible, but incoherent radiators can be built. An isotropic sound radiator is possible because sound is a longitudinal wave.

The unrelated term isotropic radiation refers to radiation which has the same intensity in all directions, thus an isotropic radiator does not radiate isotropic radiation.