NOTE: This page uses common physics notation for spherical coordinates, in which is the angle between the z axis and the radius vector connecting the origin to the point in question, while is the angle between the projection of the radius vector onto the x-y plane and the x axis. Several other definitions are in use, and so care must be taken in comparing different sources.
Famous quotes containing the word fields:
“It is not those who till the fields who eat fine rice, nor those who rear the silkworms who wear fine silks.”
—Chinese proverb.