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Memory Research Misses The Obvious
The search to reveal a mystery. Research laboratories around the world sought the location of human memory. The research had followed diverse leads. One clue related to the branched inputs of nerve cells, called dendrites. Branch growth was...
On Empathy - Part I
The Encyclopaedia Britannica (1999 edition) defines empathy as: "The ability to imagine oneself in anther's place and understand the other's feelings, desires, ideas, and actions. It is a term coined in the early 20th century, equivalent to the...
Panentheism etc.
NATURE WORSHIP: - Wicca and witchcraft or other shamanic attunements akin to the kind of ethic and awe the great and beautiful (FREE) North American Indians had before the arrival of the 'civilized' men from the Old World. "A Guide to Nature...
Sir William Crookes and Home
You may have heard about the media coverage of the Wright Brother’s flight and how it took three years before Scientific American stopped trying to debunk it. You may already know about the early 20th Century Patent Office Official who declared...
The Practical Power of the Shaman
Spirit of shamanism brings harmony and magic into everyday life Shamanism is a very practical spirituality. A modern-day shaman could live next door to you and the only clues you might have are that they get along well with people and animals and...
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The History of the Microscope
The first microscope was created hundreds of years ago. In the passing centuries, microscopes evolved into powerful, precise tools that allow scientists to view tiny objects at a level of detail that seems unreal. There are a wide array of available microscopes, from the compound microscopes commonly found in high school science classrooms to powerful scanning tunneling and electron microscopes used by Nobel Prize winners.
Most historians agree that two Dutchman made the first microscope in 1590. Zaccharias Janssen and his son Hans were two eyeglass makers who experimented with putting multiple lenses together in a tube. They found that objects under the tube were greatly enlarged. Over the next hundred years, scientists Robert Hooke, Anton van Leeuwenhoek, and others further refined the work of the Janssens and used microscopes to examine insects, blood, and other items. Scientists have continued microscopes into the present day. Now, microscopes can show tiny particles that are unseen by the naked eye in extremely exact detail.
Microscopes operate on several principles. Most common microscopes have two different lenses. Viewers look through the ocular lens, also known as the eyepiece. There is another lens, called the objective lens at the end of the ocular lens. The objective
lens is a sphere shaped lens located above the stage of the microscope. People place the object they want to examine on the stage and can adjust the lenses to bring the object into focus. Most microscopes have an adjustment knob for coarse focus and one for fine focus. Many microscopes have several objective lenses with different strengths for users to choose from. The lenses are arranged on a circular platform that can be rotated to have the different lenses put into place under the ocular lens. Microscopes also need a light source of some kind underneath the stage. Most commercial microscopes have a light bulb, but many high-end microscopes use lasers or electrons for illumination.
Microscopes have been used to make countless vital scientific discoveries. They are invaluable tools used in a variety of scientific fields that enable researchers to make discoveries that would be impossible with the naked eye.
About the Author
Microscopes Info provides detailed information about electron, compound, stereo, digital, video, and scanning tunneling microscopes, as well as an explanation of the different parts of a microscope, and more. Microscopes Info is affiliated with Business Plans by Growthink.
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