An Astronomer Is Observing the Radiation from a Distant Active

question 32

Multiple Choice

An astronomer is observing the radiation from a distant active galaxy and notices that the amplitude of the signal varies in strength regularly over a certain period. The maximum possible size for the source of this radiation can now be calculated from the

• A) period and the amplitude of the signal.
• B) period but not the amplitude of the signal.
• C) amplitude but not the period of the signal.
• D) frequency of the radiation composing the signal.

---

Definitions:

Piaget

A Swiss psychologist renowned for his theory of cognitive development that describes how children construct a mental model of the world.

Sesame Street

An educational television program designed for preschoolers, renowned for its creative use of puppetry, animation, and cultural references to teach various topics.

Cognitive Skills

Mental capabilities involved in processing information, solving problems, and making decisions.

Appearance-reality Distinction

The appearance-reality distinction is a cognitive development concept, indicating a child's ability to differentiate between how things seem and how they actually are.