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.
The U.S. Bureau of Labor Statistics reports that compensation, benefits and job analysis specialists earned an average salary of $63,310 in 2013 (www.bls.gov). It also reports a slower than average job outlook of 5.8% between 2012 and 2022.