Why it is easier to use helium ions as compared to neutral helium atoms in such a microscope from the following options: (a) Helium atoms are not electrically charged, and only electrically charged particles have wave properties. (b) Helium atoms form molecules, which are too large to have wave properties. (c) Neutral helium atoms are more difficult to focus with electric and magnetic fields. (d) Helium atoms have much larger mass than helium ions do and thus are more difficult to accelerate.

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Chapter 39, Problem 39.90PP

To determine

Why it is easier to use helium ions as compared to neutral helium atoms in such a microscope from the following options:

(a) Helium atoms are not electrically charged, and only electrically charged particles have wave properties.

(b) Helium atoms form molecules, which are too large to have wave properties.

(c) Neutral helium atoms are more difficult to focus with electric and magnetic fields.

(d) Helium atoms have much larger mass than helium ions do and thus are more difficult to accelerate.

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