The resolution of a light microscope discussed previously is directly proportional to the wavelength. To improve the resolution, light with a shorter wavelength should be used. Scientists began experimenting with ultraviolet light, which has a shorter wavelength than visible light. Due to the difficulty in generation and maintaining coherence, it was not commercially successful.
Meanwhile, the French physicist Louis de Broglie proved a traveling electron has both wave and particle duality similar to light. He was awarded a Nobel Prize in 1929 for this work.
An electron wave with higher energy will have lower wavelength and vice versa. Thus, improving the resolution would involve increasing ...
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