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Intuitive Numerology: Reading between Numbers - Part 2
A numerology report is based on one's date of birth. While numerology is the study of numbers, it can also be helpful in presenting valuable insight about specific personality traits and characteristics of individuals. By combining the sum of...
NABGG (Nat'l Assoc. of Black Geologists & Geophysicists) 23rd Annual Conference 9/15 – 9/18, 2004 - Austin, Texas
The NABGG (National Association of Black Geologists and Geophysicists) will hold it’s 23rd annual conference on Wednesday, September 15 – Saturday, September 18, 2004. HOUSTON, TX (PRWEB) August 18, 2004 -- Please plan to join us, as we convene...
PHP Pear Packages :: Why they are so important to php developers?
PEAR is short for "PHP Extension and Application Repository". It is a standard and structured library of open-sourced code for PHP users, All PHP code is written in standard style known as PCS ( PEAR Coding Standards ),it helps in maintaining the...
Programmed life
Does aging happen by chance? Is aging the breaking down of an organism till the latter eventually stops working? According to Valter Longo’s latest research, which was published in the September 27 edition of the Journal of Cell Biology, aging is a...
The Harmonic (Logos etc.)
The Harmonic In a good history book by a leading light in the field of history, I recall Michael Grant saying Pythagoras was ‘weird’. This book is The Rise of the Greeks and he does almost admit he is not qualified to judge the great sage, which...
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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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