The Density of Interstellar Dust Is Very Low, Yet It

question 61

Multiple Choice

The density of interstellar dust is very low, yet it still blocks starlight because

• A) it is so cold it absorbs higher energy photons.
• B) the dust particles are irregular in shape.
• C) there is 100 times more opaque gas than dust present in the interstellar medium.
• D) ice particles reflect all light back toward their stars, not toward us.
• E) the dust particles are about the same size as the light waves they absorb.

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Definitions:

Bipolar Disorder

A mental health condition characterized by significant mood swings, including manic episodes of high energy and depressive episodes of low mood.

Mood Disorder

A mental health classification that includes conditions affecting mood regulation, such as depression or bipolar disorder.

Type II Bipolar Disorder

A form of bipolar disorder characterized by periods of depression and at least one episode of hypomania.

Schizophrenia

A psychiatric disorder characterized by disruptions in thought processes, perceptions, emotional responsiveness, and social interactions.