If Light from a Hot, Dense Star Passes Through a Cool

question 57

Multiple Choice

If light from a hot, dense star passes through a cool cloud of gas,

• A) the atoms of the gas cloud will add energy to the overall spectrum, enhancing it at specific wavelengths to produce emission lines.
• B) the cool gas will not affect the spectrum of the star because cool atoms cannot absorb light.
• C) the whole spectrum will be reduced in intensity.
• D) only specific wavelengths of light will be removed from the spectrum.

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Definitions:

Extreme Behavior

Actions that are significantly outside the norm, often in a manner that is potentially harmful or dangerous to self or others.

Obsessive-Compulsive Disorder

A mental disorder characterized by unwanted repetitive thoughts (obsessions) and/or actions (compulsions).

Excessive Cleansing

A behavior pattern characterized by an overemphasis on cleanliness, sometimes indicative of an underlying anxiety disorder.

Common Compulsion

Repetitive behaviors or mental acts that an individual feels driven to perform in response to an obsession or according to rules that must be applied rigidly.