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.
Determination of concentration of substance tutorial all along with the key concepts of Experiment, Requirements, Procedure, Procedure, Results, Treatment of results
tutorsglobe.com association of kp and kc assignment help-homework help by online attainment of equilibrium in chemical reactions tutors
Reflection of Light tutorial all along with the key concepts of Concept of Light, Rectilinear Propagation of Light, Shadows, Eclipses, Pinhole Camera and Reflection of Light at Plane Surfaces
tutorsglobe.com medical bacteriology assignment help-homework help by online microbiology tutors
tutorsglobe.com types of bio fertilizers assignment help-homework help by online role of bio fertilizers tutors
what is Incentive Plans? To eliminate the defects of both piece-wage and time wages systems, incentive plans are employed. Within these plans, the benefits of time and piece wage systems are joint and incentives are offered to workers to work hard.
the various types of classification proposed through earlier taxonomists can be generally categorized into three systems– artificial, natural and phylogenetic.
Boost your academic grades and performance by acquiring Greek and Roman Thought Assignment Help. Order now!
Radiation Hazards tutorial all along with the key concepts of Exposure to Radiation, Radiation and Health disorders, Management of Radioactive Waste, Protective measure from Radiation laboratory work and Control of Radiation protection measure
The Electrical insulating materials are described as materials that present a very large resistance to flow of current, and for that cause they are employed to maintain the current in its appropriate path along the conductor.
tutorsglobe.com clinical manifestations assignment help-homework help by online taenia solium tutors
each task description should identify inputs, their sources. and due dates. outputs or task results should be indentified and described as to where each result goes.
Introduction to the Systematic of Insects and Mites tutorial all along with the key concepts of Objectives of Classification, Elements of Classification, General Classification of Insects, Class Insecta, Subclass Apterygota, Subclass Pterygota and General Classification of Mites
tutorsglobe offers online exam preparation courses and tutoring packages which saved high score in examination during your first attempt. we offer customized online exam preparation courses in various subjects. online exam preparation, practice sets, study martial, download papers
Applications of UV-Visible Spectroscopy tutorial all along with the key concepts of applications of uv-visible spectroscopy in Quantitative Analysis, applications in Pharmaceutical Quantitative analysis, Application of UV/Visible Spectroscopy in the determination of pKa Values
1941163
Questions Asked
3689
Tutors
1458198
Questions Answered
Start Excelling in your courses, Ask an Expert and get answers for your homework and assignments!!