J J Thomson's Experiments with a Type of Invisible Beam Known

question 35

Multiple Choice

J. J. Thomson's experiments with a type of invisible beam known as a cathode ray demonstrated that

• A) neutrons exist.
• B) light is a wave.
• C) electrons exist.
• D) light is made of particles.
• E) the atom contains a tiny nucleus containing most of the atom's mass.

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Definitions:

Internal Validity

refers to the degree to which a study accurately establishes cause-and-effect relationships free from confounding variables.

Attrition

Attrition refers to the reduction in the number of participants or subjects over the course of a study, which can affect the study's outcomes and generalizability.

Instrumentation

pertains to the process and tools used for measurement and data collection in research studies.

Measuring Device

Refers to any instrument or tool designed to quantitatively or qualitatively assess variables, states, or phenomena.