IYL 2015 Images

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    Volvox

    An optical microscope (also called a "light microscope") uses visible light and a system of lenses to magnify images of very small samples. In this image from an optical microscope, a special technique known as "differential interference contrast" that uses differences in the amount of bending of light by components of the specimen to enhance otherwise undetectable features of these volvox. Volvox are small, colonial green algae that make up a larger spherical colony. The bright green sphere within the colony is a daughter colony, a secondary colony growing on the surface of an older one.
    Image Credit: Frank Fox, www.mikro-foto.de
    view and download image here. http://lightexhibit.org/photoindex.html

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    Mouse Retina

    A laser scanning, or "confocal," microscope scans a sample point-by-point or line-by-line at once, assembling the pixel information to generate one image. This allows for a very high-resolution and high-contrast image in three dimensions. The image shown here is from a laser scanning microscope of a mouse retina, where the cells have been stained with fluorescent dye to show different features. By studying the microscopic structure of both diseased and normal retina and optic nerves through this innovative light-based technique, scientists hope to better understand the biology of these tissues and the prospects of developing therapeutic interventions.
    Image Credit: National Institute of General Medical Sciences (NIGMS)
    view and download image here. http://lightexhibit.org/photoindex.html