Transmission Electron Microscopy:
The basic principles of electron microscopy are identical to those of light microscopy; the main difference is that in electron microscope electromagnetic lenses are used not optical lenses. It also focuses a high velocity electron beam rather than visible light. The electrons are absorbed by atoms in air and that is the reason why the whole tube between the electron source and the viewing screen is sustained beneath an ultrahigh vacuum.
Figure: Working principle of light and electron microscope
The TEM directs a beam of electrons via a specimen. The electrons are emitted by a tungsten cathode whenever it is electrically heated. A condenser lens concentrates the electron beam on to the sample, objective and projects them on to a presentation screen or on a piece of photographic film.
The smallest distance D at which the two objects can be differentiated is proportional to the wavelength λ of the light which illuminates the objects. Therefore the limit of resolution for the electron microscope is hypothetically 0.005 nm or 40,000 times better than the resolution of the light microscope and 2 million times enhanced than that of unaided human eye. However in reality a resolution of 0.10nm can be acquired with TEM, around 2000 times better than the resolution of the light microscopes.
Latest technology based Biology Online Tutoring Assistance
Tutors, at the www.tutorsglobe.com, take pledge to provide full satisfaction and assurance in Light and Electron Microscope homework help via online tutoring. Students are getting 100% satisfaction by online tutors across the globe. Here you can get homework help for Light and Electron Microscope, project ideas and tutorials. We provide email based Light and Electron Microscope homework help. You can join us to ask queries 24x7 with live, experienced and qualified online tutors specialized in Light and Electron Microscope. Through Online Tutoring, you would be able to complete your homework or assignments at your home. Tutors at the TutorsGlobe are committed to provide the best quality online tutoring assistance for Biology homework help and assignment help services. They use their experience, as they have solved thousands of the Biology assignments, which may help you to solve your complex issues of Light and Electron Microscope. TutorsGlobe assure for the best quality compliance to your homework. Compromise with quality is not in our dictionary. If we feel that we are not able to provide the homework help as per the deadline or given instruction by the student, we refund the money of the student without any delay.
www.tutorsglobe.com offers tangent to circle homework help, geometry mathematics assignment help, online tutoring assistance, math solutions by online qualified tutor's help.
microbial interactions tutorial all along with the key concepts of neutralism, mutualism, commensalism, supply of nutrients, amensalism, prey-predator relationship and competition
www.tutorsglobe.com offers other aromatic compounds homework help, other aromatic compounds assignment help, online tutoring assistance, organic chemistry solutions by online qualified tutor's help.
Avail the best Mycology Assignment Help service 24/7 with top-rated experts and enhance your academic grades with ease!
Importance of Fungi tutorial all along with the key concepts of Wine Production, Beer Production, Bread Production, Fungi as a source of protein and discovery of Antibiotics
tutorsglobe.com assumptions of short-run law assignment help-homework help by online classification of production function tutors
tutorsglobe.com laboratory diagnosis of typhoid assignment help-homework help by online salmonella tutors
Hereditary Variation tutorial all along with the key concepts of Types of Variation, Morphological variation, Physiological variation, Genetic Variation, Application of Variation and Determination of the Paternity
Basic concepts in Petroleum Chemistry tutorial all along with the key concepts of Clastic Sedimentary Rocks, Non-Clastic Sedimentary Rocks, Origin and Habitat of Petroleum, Petroleum Migration and Accumulation
tutorsglobe.com role of bacteria in industry assignment help-homework help by online beneficial activities of bacteria tutors
Significant Terms used in Activity Based Costing - Cost Objects, Activities, Support activities, Cost Pool, Cost Drivers, Transaction Drivers, Duration Drivers, Intensity Drivers.
tutorsglobe.com medical lab methods assignment help-homework help by online applied biology tutors
Want a trustworthy CAD and CAM Assignment Help Service within your budget? Get contact with our PhD tutors and score A++ at feasible prices.
Theory and lecture notes of Turing machines and the automata of equal power all along with the key concepts of turing machines and the automata of equal power, Finite Automata with External Storage, queue automaton. Tutorsglobe offers homework help, assignment help and tutor’s assistance on Turing machines and the automata of equal power.
tutorsglobe.com evidences against blending theory assignment help-homework help by online concept of heredity and variation tutors
1961040
Questions Asked
3689
Tutors
1486577
Questions Answered
Start Excelling in your courses, Ask an Expert and get answers for your homework and assignments!!