Which of the Following Conditions Lead You to See an Absorption

question 55

Multiple Choice

Which of the following conditions lead you to see an absorption line spectrum from a cloud of gas in interstellar space?

• A) The cloud is cool and lies between you and a hot star.
• B) The cloud is extremely hot.
• C) The cloud is visible primarily because it reflects light from nearby stars.
• D) The cloud is cool and very dense, so that you cannot see any objects that lie behind it.

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Definitions:

UCS

Unconditioned Stimulus, a stimulus that naturally and automatically triggers a physiological reflex or emotional response without prior learning.

UCR

Unconditioned response, a natural and automatic reaction to an unconditioned stimulus without prior learning or conditioning.

CS

Short for Conditioned Stimulus, it is a term used in classical conditioning to denote a previously neutral stimulus that, after becoming associated with the unconditioned stimulus, eventually triggers a conditioned response.

Reinforced Schedule

A concept in operant conditioning that outlines how often a behavior is reinforced, influencing the frequency and predictability of the behavior.