You Observe a Distant Quasar in Which the Lyman Alpha

question 59

Essay

You observe a distant quasar in which the Lyman alpha line of hydrogen (rest wavelength = 121.6 nm) is found at a wavelength of 547.2 nm. When the light from this quasar was emitted, how large was the universe compared to its current size?

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Definitions:

NREM Sleep

The phase of sleep that includes all stages except for REM sleep, characterized by slower brain waves and less dream activity.

Oedipus Complex

In psychoanalytic theory, a child's emotions and unconscious desires towards their opposite-sex parent and jealousy and rivalry with their same-sex parent.

Pleasure Principle

A psychoanalytic concept that describes the driving force behind human behavior to seek pleasure and avoid pain.

Psychoanalytic Researchers

Individuals who study the unconscious mind and the theoretical framework developed by Sigmund Freud to understand human behavior and cognition.