Of course, there are two possible senses of rotation of circularly polarized light: right and left. If the slow axis of the quarter wave sheet is at -45Â° to the axis of the polarizer you get circular polarization of the opposite sense compared to what you get if it's oriented at +45Â°.
A credential specialist working in the United States earns an average of $13.82 to $17.91 per hour, or $29,796 to $39,988 annually, according to Payscale, as of September 2010.
In four U.S. regions in 2010, process technicians had average annual salaries higher than $60,000. The highest average pay was in the Allentown-Bethlehem-Easton metro area of Pennsylvania and New Jersey, at $67,130 per year.