Question

Fill in the blank with the proper word
An electron microscope is necessary for the study of ______.

Answer 1

An electron microscope is a microscope that illuminates with a beam of accelerated electrons. An electron's wavelength can be $100,000$ times smaller than that of visible light photons.
It's a high-resolution microscope that can magnify objects down to nanometres, and it's made possible by the controlled utilisation of electrons in vacuum caught on a phosphorescent screen.

Complete answer:
A microscope is a laboratory instrument used to examine objects that are too small to be seen by the naked eye.
Electron microscope is a type of microscope used for the study of cells.
Applications of electron microscope-
It is used in pathology to investigate microscopic aspects of various disorders, including malignancies.
It is utilised in chemistry for quality control and assurance, atomic structure analysis, and drug development.
It is used for high-resolution $2$D and $3$D imaging, semiconductor inspection, and computer chip manufacturing in the technology industry.
In forensics, SEM is commonly used for gunshot residue analysis, firearm identification, gemstone and jewellery inquiry, counterfeit banknotes, non-conducting material tests, and so on.
In geology, scanning electron microscopy (SEM) is a common technique for studying rocks and minerals.

Note:

LIGHT MICROSCOPE	ELECTRON MICROSCOPE
Magnifies items with visible light.	Electron beams are used to magnify small objects.
Object enlargement is less than that of its electron counterpart.	A high-resolution magnification tool with extensive features.
The optical microscope has a resolution of about $0.25$m, which is quite poor.	It has a resolution power of around $0.001$ higher than an optical one.
It does not require the use of any filament.	To release electrons, it uses tungsten filament.
It allows living and dead organisms to be viewed.	There are just desiccated and dead organisms visible.
It does not necessitate a significant level of maintenance.	The instrument's upkeep is very pricey.
Glass is used for the condenser, eyepiece, and objective lens.	Electromagnetic lenses are used in all of the lenses.