1 Indeed, over 100 million Americans are now dependent on the Federal government for something. 2  Taxes were significantly lower in 1929 than today, even as a percent of family income. 3  Most businesses paid no taxes in 1929, and today we have the highest corporate tax rate in the world.4  Sales and FICA taxes didnât exist. Indeed, over 100 million Americans are now dependent on the Federal government for something. 2  Taxes were significantly lower in 1929 than today, even as a percent of family income. 3  Most businesses paid no taxes in 1929, and today we have the highest corporate tax rate in the world. 4  Sales and FICA taxes didnât exist.
A compound microscope uses a lens close to the object being viewed to collect light (called the objective lens) which focuses a real image of the object inside the microscope (image 1). That image is then magnified by a second lens or group of lenses (called the eyepiece) that gives the viewer an enlarged inverted virtual image of the object (image 2).
Play media. Fluorescent and confocal microscopes operating principle. A fluorescence microscope is an optical microscope that uses fluorescence and phosphorescence instead of, or in addition to, reflection and absorption to study properties of organic or inorganic substances. The fluorescence microscope refers to any microscope that uses fluorescence to generate an image, whether it is a more simple set up like an epifluorescence microscope, or a more complicated design such as a confocal microscope, which uses optical sectioning to get better resolution of the fluorescent image.