10 Questions
SEM stands for scanning electron ______
microscope
SEM is an instrument that produces high-resolution and high-magnified images of samples using ______ instead of light
electrons
A beam of electrons produced by an electron gun is placed at the top of the ______
microscope
The anode attracts these electrons and focuses on the ______ lens
magnetic
Once the beam of electrons strikes the target, secondary electrons, backscattered electrons, and x-rays are ejected from the ______
sample
What is the main advantage of using an electron microscope over a light microscope for studying nanoparticles?
The main advantage is the better resolution provided by the electron microscope.
How does a scanning electron microscope (SEM) produce high-resolution and high-magnified images of samples?
SEM produces high-resolution and high-magnified images of samples by using electrons instead of light.
Explain the process of how the beam of electrons in the SEM is focused towards the sample (specimen).
The beam of electrons is focused towards the sample (specimen) by traveling through the magnetic lenses, which focus the beam down towards the sample.
What are the different types of electrons and x-rays ejected from the sample when the beam of electrons strikes the target in SEM?
The different types of electrons and x-rays ejected from the sample are secondary electrons, backscattered electrons, and x-rays.
Why is the resolution of the electron microscope better than that of a light microscope?
The resolution of the electron microscope is better due to the use of matter (electron) waves, which provide better resolution than light.
Test your knowledge of the application of quantum physics with this quiz on the introduction of microscopes. Explore the principles and technology behind microscopes, and understand how they are used to study detailed images of samples.
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