What Type of Particle Is an Electron? (There May Be

question 7

Multiple Choice

What type of particle is an electron? (There may be more than one correct choice.)

• A) lepton
• B) meson
• C) baryon
• D) nucleon
• E) hadron

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Definitions:

Tonometer

An instrument for determining pressure or tension, especially determining ocular tension.

Retinoscope

An instrument used by eye doctors to shine a light into the patient's eye to observe the reflection from the retina, helping to determine the patient's prescription for glasses or contact lenses.

Ophthalmoscope

A hand-held instrument with a light; used to view inner eye structures.

Slitlamp

A microscope combined with a bright light used to examine the eye's anterior and posterior segments, aiding in detecting eye diseases.