In order to see the specimen, it needs some contrast. This is why materials like silver or gold are often used for field emission transmission electron microscopy (FETEM) because they produce more contrast between the object and background as well as have high resolution capabilities so objects can be seen clearly with incredible detail. This is why materials like silver or gold are often used for field emission transmission electron microscopy (FETEM) because they produce more contrast between the object and background as well as have high resolution capabilities so objects can be seen.
Some people might think that a light microscope should work, but this isn’t the case. Magnification in relation to size cannot make up for lack of contrast when viewing an image, which makes specimens smaller than 200 nm invisible with a regular light microscope.
A person could try using different lenses on their microscope to increase magnification power to see if any images would appear closer up, but it’s not possible due to limitations imposed by physics laws such as diffraction limits. All that remains at this point is F For a specimen to be visible, it needs some contrast. This is why materials like silver or gold are often used for field emission transmission electron microscopy (FETEM) because they produce more contrast between the object and background as well as have high resolution capabilities so objects can be seen at smaller sizes.
The truth is that most specimens smaller than 200 nm cannot be seen with a light microscope because their size does not create enough contrast between the object and background. For a specimen to be visible, it needs some contrast. This is why materials like silver or gold are often used for field emission transmission electron microscopy (FETEM) because they produce more contrast between the object and background as well as have high resolution capabilities so objects can beMany people are intrigued by the microscopic world, and they often wonder what it’s like to see that small of a specimen. The truth is that most specimens smaller than 200 nm cannot be seen with a light microscope because their size does not create enough contrast between the object and background.