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.
Compound Light Microscope: The microscope pictured above is referred to as a compound light microscope. The term light refers to the method by which light transmits the image to your eye. Compound deals with the microscope having more than one lens. Microscope is the combination of two words; micro meaning small and scope meaning view. Early microscopes, like Leeuwenhoek's, were called simple because they only had one lens. Simple scopes work like magnifying glasses that you have seen and/or used.
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.