You searched for: “relativity
relativity (s) (noun), relativities (pl)
Primarily, a theory developed by Albert Einstein which states that the way anything, except light, moves through time and space depends on the position and movement of the person who is observing or watching it: "Relativity is considered to be the dependence of various physical phenomena on the comparative motions of the observer and the objects that are seen; especially, regarding the nature and behavior of light, space, time, and gravity."
This entry is located in the following unit: later-, lateral-, -late, -lat, -lation, -lative (page 2)
Word Entries at Get Words: “relativity
relativity
Theories of physics proposed by Albert Einstein in 1905 to explain the influence of he relative motion and position of an observer on his own observations.

They say, among other things, that space and time can not be considered separate ideas. The perception of space-time is different for a person standing still on earth than it is for someone moving very fast away from or toward it.

What we see is relative to (depends on) our acceleration as we move.

The General Theory of Relativity, published in 1916, defined gravitation as a function of four-dimensional space-time.

This entry is located in the following unit: Astronomy and related astronomical terms (page 22)