Cosmic Microwave Background Radiation Quiz

What is the most crucial evidence supporting the Big Bang theory?

• Gravitational waves

• Cosmic microwave background radiation

• Dark matter

• Black holes

What happened to the universe when it was around 380,000 years old?

• It formed the first stars

• It expanded rapidly

• It became filled with dark matter

• It cooled down enough for hydrogen plasma to become hydrogen gas

How far were the blobs of plasma from the patch of space that would later contain the Milky Way?

• 380,000 light years

• 1,100 light years

• 93 billion light years

• 43 million light years

What is the advantage of attempting the harder question in the CMB challenge?

• It requires no math

• You compete against fewer people

• It is easier to solve

• It has more hints provided

What is the main reason the universe became transparent during recombination?

• Formation of helium atoms

• Capture of free electrons by protons to form hydrogen atoms

• Expansion of the universe

• Cooling of the universe

What is required to solve the mathematical question about photon travel before recombination?

• Data on gravitational waves

• Knowledge of the speed of light

• Estimate of baryonic mass and volume of the observable universe

• Understanding of black holes

What is the subject line required for submitting answers to the CMB challenge?

• CMB Challenge

• CMB Quiz

• Big Bang Theory

• Cosmic Background

What is the main topic of the public seminar announced in the video?

• Black holes

• Dark matter

• Gravitational waves

• Cosmic microwave background radiation

Where is the public seminar on gravitational waves being held?

• Harvard University

• Lehman College in New York City

• Stanford University

• MIT

What should you do if you want to attend the seminar on gravitational waves?

• Just show up at the venue

• RSVP to [e-mail] with the subject line NYC Gravitational Waves

• Purchase a ticket online

• Contact the college directly