The Energy-Generation Mechanism for Active Galaxies Is Believed to Be

question 64

Multiple Choice

The energy-generation mechanism for active galaxies is believed to be

• A) large numbers of supernovae erupting simultaneously.
• B) cosmic radioactive decay.
• C) black holes colliding.
• D) accretion disks around supermassive black holes.

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Definitions:

Perception

The process of organizing and interpreting sensory information to make it meaningful.

Absolute Threshold

The minimum stimulus intensity required to detect a stimulus or produce a sensory response in at least 50% of trials, indicating the limits of human sensory perception.

Difference Threshold

The smallest amount of change between two stimuli that a person can detect 50% of the time, also known as the just noticeable difference (JND).

Sensory Adaptation

The process by which sensory receptors become less sensitive to constant stimuli over time, leading to a decrease in sensation.