Figure 9-5 in Comins,Discovering the Essential Universe,6th Ed

question 94

Multiple Choice

Figure 9-5 in Comins,Discovering the Essential Universe,6th ed.,shows an image taken through a filter that passes the red Hα hydrogen line and blocks other wavelengths.Why does this image show the chromosphere but not the photosphere?

• A) The chromosphere is cooler than the photosphere and therefore emits Hα, while the warmer photosphere does not.
• B) The chromosphere is warmer than the photosphere and therefore emits Hα, while the cooler photosphere does not.
• C) The photosphere lacks hydrogen and therefore cannot emit Hα.
• D) The Hα emitted by the photosphere is blocked by the chromosphere.

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Definitions:

Compulsions

Repetitive behaviors or mental acts that a person feels driven to perform in response to an obsession, typically aimed at reducing anxiety or preventing a feared event or situation.

Recurrent Thoughts

Repeated thoughts or ideas that frequently occupy a person's mind.

Recurrent Behaviors

Repetitive actions often performed with little conscious thought, which can be part of routines, habits, or compulsions.

Social Phobia

A severe anxiety disorder characterized by a significant amount of fear in one or more social situations, causing considerable distress and impaired ability to function in at least some parts of daily life.