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Between 1 nanometre and 1 micrometre (= 1000 nm).
1.85 x 10^-1 nm
It is: 4.0*10^2 nm
I think the person you were talking to was meant to put "nm" wich means nothing much x
0.278 nm = 0.000278 µm
for a field emission gun you can go to 5-2 nm resolution
electron microscope
Up to about 750,000 times. Strictly, it is not magnification that matters with any microscope. There is no practical value in enlarging an image if the enlargement reveals no further detail, but just makes the blur bigger!The critical factor is resolution, which is a measure of the detail that can be discerned in the image. A transmission electron microscope (TEM) has, at best, a resolution of about 1 nm, which means that objects closer than 1 nanometer apart cannot be distinguished. This is about 100 times the best resolution available using a light microscope.
The ability to distinguish close objects is called resolution or resolving power.It is important in microscopy as well as in other fields involving optical instruments, such as photography.A light microscope, using a high-power objective with oil immersion, can achieve a resolution of about 0.2 μm (micrometers). An electron microscope has, in practice, a resolving power about 100 times that, namely 1 to 2 nm (nanometers).
Transmission elctron microscope
Around 0.2micrometers or 200 nm
Because the smallest wavelength of visible light we can see is around 400 nm. Something 200 nm would need an electron microscope to be seen.
It uses an electron beam. An electron microscope is a type of microscope that uses an electron beam to magnify and illuminate a specimen. An electron microscope has greater resolving power than a light microscope and can reveal the structure of smaller objects because electrons have wavelengths about 100,000 times shorter than visible light photons. They can achieve better than 50 pm resolution and magnifications of up to about 10,000,000x whereas ordinary, non-confocal light microscopes are limited by diffraction to about 200 nm resolution and useful magnifications below 2000x.
Light microscopes can observe objects of 100 nm- 1 mm. Electron microscopes can observe objects of 1 nm-100 µm.
Nm=not much. Wbu=what about you.
nm= not much
Nm = Newton metre