The Extinction of Starlight Due to the Interstellar Medium

question 53

Multiple Choice

The extinction of starlight due to the interstellar medium
I. is the greatest in the ultraviolet.
II. is the greatest in the infrared.
III. is caused by ionized hydrogen.
IV. is caused by dust particles.

• A) I,III
• B) II III
• C) I, IV
• D) II IV
• E) only IV

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Definitions:

Inductive Argument

A type of reasoning in which the premises seek to supply strong evidence for (not absolute proof of) the truth of the conclusion.

Positive Correlation

The incidence of one event increases when the second one increases.

Occurrence of Events

The happening or taking place of incidents or actions, often considered in terms of their frequency or significance.

Analogies

A form of reasoning or argumentation in which similarities between two different things are drawn to explain or clarify a concept.