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The property of magnetic field to converge electrons is used in microscopes as ___________

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The property of magnetic field to converge electrons is used in microscopes as ___________

(a) Magnetic Convergence

(b) Magnetic plate

(c) Magnetic field

(d) Magnetic Lens

This question was posed to me in a job interview.

Question is taken from Maxwell’s Equations topic in portion Electrodynamics of Engineering Physics II

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Right option is (d) Magnetic Lens

Easiest explanation: When a charge is moving in a magnetic field, it feels a force perpendicular to its direction of motion and the direction of the magnetic field. Due to this property, magnetic field can be used to converge electrons.

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