By American Academy of Ophthalmology, Debra J. Shetlar, MD
Discusses advances within the analysis and category of tumors because it publications the reader via a logical, tissue-specific series that levels from topography via ailment method to basic and differential analysis. comprises many new colour pathologic and medical images and diagrams. Covers wound fix; specimen dealing with, together with processing and marking; and diagnostic options. additionally contains a list for asking for ophthalmic pathologic session.
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Additional resources for 2007-2008 Basic and Clinical Science Course Section 4: Ophthalmic Pathology and Intraocular Tumors
The failure of Maxwell's wave theory of radiation to explain blackbody emission was serious in view of the impressive previous successes of that theory. Byassuming that the radiation within the cavity could not exist with a continuous distribution of energies but only with certain energies hv, with particular frequeneies determined by the boundary conditions within the cavity, Planck derived a radiation law which closely described blackbody emission spectra for radiators of different temperatures.
The units used to describe energy, wavelength and frequency often differ from region to region as a matter of convention. Gamma and X radiation are generally described in terms of photon energy. Ultraviolet, visible (light) and infrared radiations, collectively known as optical radiation, are described in terms of wavelength; radiofrequency (including microwave) radiations are specified in terms of frequency. Sometimes the spectral region above approximately 100 nm is termed ionizing radiation, and wavelengths longer than 100 nm are placed in the nonionizing radiation spectrum.
Figure 2-10 is repoduced from Thomas Young's original drawing illustrating interference maxima. One of the simplest experiments illustrating interference involves the use of two parallel slits with widths on the order of a few wavelengths of light at a distance ~ apart. If radiation of wavelength A is used, and if I) d is the angular distance on the screen measured in a plane normal to the slit axes, it is easy to show that: (2-15) Sliney and Wolbarsht 30 Figure 2-10. Young's original illustration showing interference of light waves from two sources SI and S2.
2007-2008 Basic and Clinical Science Course Section 4: Ophthalmic Pathology and Intraocular Tumors by American Academy of Ophthalmology, Debra J. Shetlar, MD