VMC-0085
QUESTION
Type of lenses employed in electron microscope?
OPTIONS
(A) Glass
(B) Quartz
(C) Optic fibre
(D) Electromagnetic fields
ANSWER
(D) Electromagnetic fields
EXPLANATION
Electron microscopes do not use glass optical lenses to focus visible light. Instead, electromagnetic lenses generate magnetic fields that focus the electron beam. Therefore option D is correct; glass and quartz are optical lens materials, while optic fiber is unrelated to electron microscopy.
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