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- W2022785109 abstract "Bioscience and premedical profession students are a major demographic served by introductory physics courses at many colleges and universities. Exposing these students to biological applications of physical principles will help them to appreciate physics as a useful tool for their future professions. Here I describe an experiment suitable for introductory physics where principles of wave optics are applied to probe the size of onion epidermal cells. The epidermis tissue is composed of cells of relatively uniform size and shape (Fig. 1) so the tissue acts like a one-dimensional transmission diffraction grating. The diffraction patterns generated when a laser beam passes through the tissue (Fig. 2) are analyzed and an estimate of the average width of individual onion epidermal cells is calculated. The results are compared to direct measurements taken using a light microscope. The use of microscopes and plant-cell tissue slides creates opportunities for cross-discipline collaboration between physics and biology instructors." @default.
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- W2022785109 date "2012-09-10" @default.
- W2022785109 modified "2023-09-27" @default.
- W2022785109 title "Estimating the Size of Onion Epidermal Cells from Diffraction Patterns" @default.
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- W2022785109 doi "https://doi.org/10.1119/1.4752048" @default.
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