The CMB Can Be Regarded as a "Wall" Beyond Which

question 17

Multiple Choice

The CMB can be regarded as a "wall" beyond which we cannot see light because

• A) photons couldn't leave the hot plasma before the recombination period.
• B) we haven't discovered the technology to detect light from earlier epochs.
• C) galaxies absorb all the photons from earliest times, closer to the Big Bang.
• D) there existed only massive particles within the universe in the first 380,000 years of existence; there were no photons.
• E) behind the CMB "wall" there is a huge black hole that doesn't allow light to escape.

---

Definitions:

Problem-solving Abilities

The capacity to identify, define, and solve problems through logical and systematic approaches.

Conservation Skills

Conservation skills refer to the ability to understand that certain properties of objects, such as volume or mass, remain the same despite changes in the form or arrangement of the objects.

Piaget

Refers to Jean Piaget, a Swiss psychologist known for his pioneering work in the study of child development and his theory of cognitive development.

Moral Reasoning

The process by which individuals make decisions about what is right and wrong, often based on societal norms, personal values, and ethics.