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  2. File:Human Cheek Epithelial Cells - How to Prepare a Wet ...

    en.wikipedia.org/wiki/File:Human_Cheek...

    Date/Time Thumbnail Dimensions User Comment; current: 12:22, 6 April 2014: 3 min 52 s, 480 × 360 (7.38 MB): Jacopo Werther == {{int:filedesc}} == {{Information |Description = Step-by-step video and audio instructions on how to prepare a wet mount specimen of eukaryotic animal cells; specifically Human epithelial cells from the inside of the cheek.

  3. AP Capstone - Wikipedia

    en.wikipedia.org/wiki/AP_Capstone

    AP Seminar is the foundation course taken in 10th or 11th grade. It provides students the opportunity to develop critical thinking skills and prepare for university. Students explore real-world issues such as innovation , sustainability and technology.

  4. Magnification - Wikipedia

    en.wikipedia.org/wiki/Magnification

    Stepwise magnification by 6% per frame into a 39-megapixel image. In the final frame, at about 170x, an image of a bystander is seen reflected in the man's cornea. Magnification is the process of enlarging the apparent size, not physical size, of something. This enlargement is quantified by a size ratio called optical magnification.

  5. Objective (optics) - Wikipedia

    en.wikipedia.org/wiki/Objective_(optics)

    Two Leica oil immersion microscope objective lenses; left 100×, right 40×. The objective lens of a microscope is the one at the bottom near the sample. At its simplest, it is a very high-powered magnifying glass, with very short focal length. This is brought very close to the specimen being examined so that the light from the specimen comes ...

  6. Optical microscope - Wikipedia

    en.wikipedia.org/wiki/Optical_microscope

    A 40x magnification image of cells in a medical smear test taken through an optical microscope using a wet mount technique, placing the specimen on a glass slide and mixing with a salt solution. Optical microscopy is used extensively in microelectronics, nanophysics, biotechnology, pharmaceutic research, mineralogy and microbiology. [28]

  7. Microscopy - Wikipedia

    en.wikipedia.org/wiki/Microscopy

    Antonie van Leeuwenhoek (1632–1723). The field of microscopy (optical microscopy) dates back to at least the 17th-century.Earlier microscopes, single lens magnifying glasses with limited magnification, date at least as far back as the wide spread use of lenses in eyeglasses in the 13th century [2] but more advanced compound microscopes first appeared in Europe around 1620 [3] [4] The ...

  8. Dark-field microscopy - Wikipedia

    en.wikipedia.org/wiki/Dark-field_microscopy

    The condenser lens focuses the light towards the sample. The light enters the sample. Most is directly transmitted, while some is scattered from the sample. The scattered light enters the objective lens, while the directly transmitted light simply misses the lens and is not collected due to a direct-illumination block (see figure).

  9. Telecentric lens - Wikipedia

    en.wikipedia.org/wiki/Telecentric_lens

    A telecentric lens is a special optical lens (often an objective lens or a camera lens) that has its entrance or exit pupil, or both, at infinity. The size of images produced by a telecentric lens is insensitive to either the distance between an object being imaged and the lens, or the distance between the image plane and the lens, or both, and ...