What is used as a source of illumination in electron microscope?

Electrons

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Electromagnets

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Magnetic waves

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Photons

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Solution

The correct option is A Electrons
An electron microscope is a microscope that uses a beam of accelerated electrons as a source of illumination. Because the wavelength of an electron can be up to 100,000 times shorter than that of visible light photons, the electron microscope has a higher resolving power than a light microscope and can reveal the structure of smaller objects. Therefore, the correct answer is option A.

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