A proper frame, or comoving frame, is a frame of reference that is attached to an object. The object in this frame is stationary within the frame, which is useful for many types of calculations.
For example, a freely falling elevator is a proper frame for a free falling object in the elevator, while the surface of the Earth is not.
Proper frames can be inertial as well as non-inertial as in the example above.
Read more about Proper Frame: See Also
Famous quotes containing the words proper and/or frame:
“There is no mystery in a looking glass until someone looks into it. Then, though it remains the same glass, it presents a different face to each man who holds it in front of him. The same is true of a work of art. It has no proper existence as art until someone is reflected in it—and no two will ever be reflected in the same way. However much we all see in common in such a work, at the center we behold a fragment of our own soul, and the greater the art the greater the fragment.”
—Harold C. Goddard (1878–1950)
“But angels come to lead frail minds to rest
In chaste desires, on heavenly beauty bound.
You frame my thoughts, and fashion me within;
You stop my tongue, and teach my heart to speak;”
—Edmund Spenser (1552?–1599)