Cosmic Microwave Background Challenge | Space Time | PBS Digital Studios

The video discusses the Big Bang theory, focusing on the cosmic Microwave Background (CMB) radiation as key evidence. It explains how the universe was once smaller and denser, and how CMB photons traveled through an expanding universe. Two challenge questions are presented: one conceptual and one mathematical, with instructions for submission. An announcement is made about a seminar on gravitational waves at Lehman College.

What is the significance of the cosmic Microwave Background radiation in relation to the Big Bang theory?

How did the distance that photons could travel change after the emission of the cosmic Microwave Background radiation?

Describe the state of the universe when the cosmic Microwave Background radiation was emitted.

Explain how the expansion of the universe affects the distance that light from the cosmic Microwave Background travels to reach us today.

Discuss the implications of the observable universe being 93 billion light years across in relation to the cosmic Microwave Background.

What event is referred to as recombination, and why is it important in the context of the cosmic Microwave Background?

What factors must be considered to estimate the average distance a photon could travel before being scattered by an electron just before recombination?