Suppose We Observe a Source of X-Rays That Varies Substantially

question 52

Multiple Choice

Suppose we observe a source of X-rays that varies substantially in brightness over a period of a few days. What can we conclude?

• A) The X-ray source must be a quasar.
• B) The X-ray source must contain a black hole with an accretion disk.
• C) The X-ray source can be no more than a few light-days in diameter.
• D) The X-ray source must have a strong, rapidly varying magnetic field.
• E) We must seeing the rapid orbit of two stars in a binary system.

---

Definitions:

Organic Analogy

A concept in sociology that compares societies to living organisms, where different parts function interdependently to maintain the whole.

Human Body

The physical structure of a human being, consisting of a skeletal framework, muscular system, and various organs, functioning as an integrated whole.

Interrelated Parts

Components or elements that are connected in such a way that changes in one can affect the others.

Tabula Rasa

A theory asserting that individuals are born without built-in mental content, and that all knowledge comes from experience or perception.