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Useful for observation of mineral thin sections , hairs , fibers , particles , bones , chemical crystals , polymers , and a wide variety of other specimens , polarized light can be employed for both quantitative as well as qualitative investigations . Despite the fact that the document directly concerns only environment , in this situation the signing of the Convention by all five states , gives rise to hope that the status of the Caspian Sea will be determined by diplomatic means exclusively without resort to force . In turn , those airmen were empowered to think on the fly , incorporating theories considered on the leading edge of innovation , such as effects-based warfare , nodal analysis , and concentric rings . Joint Vision 2010 , with its four operational concepts and two key enablers , was complemented by the Air Force vision , Global Engagement , and a vision for the 21st century , and its six core competencies . Intel Play QX3 Computer Microscope Digital Image Galleries - Visit our galleries containing digital images from this incredible toy microscope after modification for enhanced brightfield , polarized light , darkfield , and Rheinberg illumination . Imaging of specimens contained in the gallery was assisted by the various contrast-enhancing technology featured by the MIC-D , including brightfield , darkfield , oblique , polarized light and reflected illumination , and the galleries are arranged according to contrast technique . Polarized Light Microscopy Digital Image Gallery - As a contrast-enhancing optical technique , polarized light microscopy is unsurpassed in the magnificent array of colors and beautiful textures generated through interference between orthogonal wavefronts at the analyzer .