Cosmic Microwave Background Discoveries

Mordecai-Mark Mac Low explains the Big Bang theory, highlighting that the universe was once as bright as the sun. This light, now stretched into microwaves, forms the Cosmic Microwave Background. Initially predicted in the 1940s, it was ignored until the 1960s when Peebles and Dicke sought to verify it. Penzias and Wilson, using a microwave antenna, accidentally discovered this cosmic radiation, leading to a Nobel Prize for their observational work.

What does the Big Bang theory suggest about the early universe?

• It was the same temperature as today.

• It was as bright as the surface of the sun.

• It was darker than the current universe.

• It was colder than the surface of the sun.

What happened to the light emitted from the early universe?

• It turned into sound waves.

• It stretched into longer wavelengths.

• It remained as visible light.

• It disappeared completely.

When was the idea of background radiation first understood?

• In the 1980s

• In the 1940s

• In the 1920s

• In the 1960s

What was the initial purpose of the microwave antenna used by Penzias and Wilson?

• To measure the Earth's atmosphere

• To follow communications satellites

• To study the sun

• To detect cosmic radiation

What unexpected issue did Penzias and Wilson encounter with their antenna?

• It was detecting too much noise.

• It was too small.

• It was not sensitive enough.

• It was pointing in the wrong direction.

What did Penzias and Wilson initially suspect was causing the noise in their antenna?

• Interference from the sun

• Pigeon droppings

• A faulty cable

• A nearby radio station

Who were the scientists at Princeton University working on the prediction of cosmic radiation?

• Newton and Galileo

• Curie and Fermi

• Peebles and Dicke

• Einstein and Hawking

What was the reaction of Dicke when he learned about Penzias and Wilson's discovery?

• He felt they had been scooped.

• He was excited.

• He was disappointed.

• He was indifferent.

What did the collaboration between Penzias, Wilson, Peebles, and Dicke result in?

• Confirmation of the Cosmic Microwave Background

• A new type of telescope

• The discovery of a new planet

• A new theory of relativity

Who received the Nobel Prize for the discovery of the Cosmic Microwave Background?

• Only Peebles and Dicke

• Only Penzias and Wilson

• All four scientists

• None of them