For Absorption Lines in the Paschen Series of Hydrogen to Be

question 101

Multiple Choice

For absorption lines in the Paschen series of hydrogen to be seen in the infrared spectrum of a star (see Section 3-17 of Comins,Discovering the Essential Universe,6th ed.) ,the temperature of its surface must be high enough to excite electrons by collision to the:

• A) n = 2 energy level.
• B) n = 4 energy level.
• C) ionization level.
• D) n = 3 energy level.

Understand the definition and characteristics of various sleep disorders.

Recognize the prevalence and impact of hypersomnolence and its association with mood disorders.

Identify the gender and age demographics most affected by chronic insomnia.

Differentiate between hypersomnolence and other sleep disorders such as insomnia and narcolepsy.

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