Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
How is magnification in scanning electron microscope controlled?
Magnification in scanning electron microscope:
Magnification into a SEM (scanning electron microscope) can be controlled over a range of regarding 5 orders of magnitude start from x25 or less to x 250,000 or more. Not like optical and transmission electron microscopes, representation magnification into the SEM (scanning electron microscope) is not a function of the power of the purpose lens. SEMs (scanning electron microscopes) may have objective and condenser lenses, but their purpose is to focus the beam to a spot, and not to illustrate the specimen. Given the electron gun can produce a beam with sufficiently small diameter, a SEM (scanning electron microscope) could in principle work fully without condenser or objective lenses, although this might not be extremely versatile or attain very high resolution. In an SEM, as in scanning probe microscopy, magnification results through the ratio of the dimensions of the raster onto the specimen and the raster onto the display device. Assuming which the display screen has a fixed size, higher magnification results by reducing the size of the raster onto the specimen, and vice versa. Therefore Magnification is controlled through the current supplied to the x,y scanning coils, and not through objective lens power.
INSTANTANEOUS ACCELERATION: The acceleration of the body at any certain instant during its motion is called to be an instantaneous acceleration.
Which atomic model did Erwin Schrodinger create? Schrodinger's wave equation was based on the Heisenberg uncertainty principal that the position and velocity of an electron can
Q. A prism is made of glass of unknown refractive index. A parallel beam of light is incident on a face of the prism. The angle of minimum deviation is measured to be 40°.What is t
Conservation of angular momentum The overall angular momentum of any closed system remains constant. There are many other laws which deal with particle physics, as conserv
explain the refractive index of the transparent liquid using prism spectrometer?
What does it signify to say that the electric potential is a function of x only? More exclusively what does the equipotential diagram (in 3-dimensional space) look like in the case
what is expansion of solids
when we prepare a assignment on this topic what can I do
Define Space Station Pressure (MIT)? A space station consists of a huge cylinder of radius Ro filled with air. The cylinder revolve about its symmetry axis at an angular spee
Illustrate the A and B coefficients of Einstein in shortly. Einstein’s A and B coefficients: Einstein suggested a mathematical expression for the existence of stimulated emi
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd