Explain about the term electron microscope, Physics

Assignment Help:

Explain about the term electron microscope.

Electron microscope:

An electron microscope is a form of microscope which uses electrons to illuminate a specimen and make an enlarged figure. Electron microscopes have much superior resolving power than light microscopes and can acquire much higher magnifications. Several electron microscopes can magnify specimens up to two million times, whereas the best light microscopes are restricted to magnifications of two thousand times. Both electron and light microscopes have resolution restrictions, imposed through their wavelength. The greater magnification and resolution of the electron microscope is because of the wavelength of an electron, its de Broglie wavelength, being very smaller than which of a light photon, electromagnetic radiation.

221_Electron microscope.png

Electron microscope

The electron microscope utilises electrostatic and electromagnetic lenses into forming the image through controlling the electron beam to focus this at a exact plane relative to the specimen in a way similar to how a light microscope uses glass lenses to focus light onto or by a specimen to form an image.


Related Discussions:- Explain about the term electron microscope

Explain ballast volume pressure, Explain Ballast Volume Pressure? Two c...

Explain Ballast Volume Pressure? Two containers I and II prodigal with an ideal gas are connected by two small openings of the same area, A, through a ballast volume B. The tem

Estimate the specific heat for the substance, It takes 46.0 J to raise the ...

It takes 46.0 J to raise the temperature of an 10.1 g piece of unknown substance from 13.0 o Cto  40.1 o C. What is the specific heat for the substance?

Write a mathematical expression for refractive index, Write a mathematical ...

Write a mathematical expression for refractive index of the material of a prism in terms of its angle. Is the mathematical expression true for all positions of the prism?

What are the characteristics of laser beam, Q. What are the characteristics...

Q. What are the characteristics of laser beam? Characteristics of laser The laser beam (a) is monochromatic. (b) is coherent with the waves all exactly in phase with o

What is the wavelength of the light, The width of the central bright band o...

The width of the central bright band of a diffraction pattern is 2.9 cm. Laser light of unknown wavelength passes through a single slit that is 0.042 mm wide and onto a screen

What are bare fibers, What are bare fibers? It used mostly with PMMA fi...

What are bare fibers? It used mostly with PMMA fibers and refers to the optics which have no external protection sheath.

How we calculate the speed of the water of a river, A boat can travel at a ...

A boat can travel at a speed of 3 m s -1 on still water. A boatman needs to cross a river whilst covering the shortest possible distance. In what direction should he row with resp

Simple and damped simple harmonic oscillations, composiotion of two simple...

composiotion of two simple harmonic motions ai right angles to each other nd having time period in the ratio 1:2

An experiment with two spikes, An experiment with two spikes Use the dr...

An experiment with two spikes Use the drill for a rotation machine as in the above experiment. Unite two spikes by attaching the point end of every to the end of a 15 cm length

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

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!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd