. The anatomy of science. Science. 68 THE ANATOMY OF SCIENCE 3. Likewise the spatial distance between two events does not depend upon the particular bases from which a survey is made, or, as geome- ters would say, it is independent of the choice of particular axes of reference. This postulate may be called relativity of position in space. 0' / i B C /. 4. If two bodies are in relative motion we may equally well say that either is at rest and the other in motion. This postulate may be called relativity of motion. It will be noted that the last three postulates deal with relatives, only the firs
. The anatomy of science. Science. 68 THE ANATOMY OF SCIENCE 3. Likewise the spatial distance between two events does not depend upon the particular bases from which a survey is made, or, as geome- ters would say, it is independent of the choice of particular axes of reference. This postulate may be called relativity of position in space. 0' / i B C /. 4. If two bodies are in relative motion we may equally well say that either is at rest and the other in motion. This postulate may be called relativity of motion. It will be noted that the last three postulates deal with relatives, only the first wdth absolutes. From these postulates certain theorems arise. For example, if B is moving with respect to A, and C in the same direction with respect to B, then the velocity of A with respect to C is the sum of these two velocities; for in the left half of Figure 14 let us represent as before a string with three beads, at two different instants sepa-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Lewis, Gilbert Newton, 1875-1946. New Haven, Yale University Press; London, H. Milford, Oxford University Press
Size: 2027px × 1233px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookcollecti, bookdecade1920, booksubjectscience
