Front

What is the Big Bang Theory?

Back

The Big Bang Theory is the leading explanation for the origin of the universe, stating that it began as a singularity approximately 13.8 billion years ago and has been expanding ever since.

Front

Why was hydrogen the first element formed after the Big Bang?

Back

Hydrogen was the first element formed because it is the simplest element, consisting of just one proton and one electron.

Front

What are the two most abundant elements in the visible universe?

Back

The two most abundant elements in the visible universe are Hydrogen and Helium.

Front

What does the observation that galaxies are moving away from us indicate?

Back

It indicates that the universe is expanding, a key piece of evidence supporting the Big Bang Theory.

Front

What is Cosmic Background Radiation?

Back

Cosmic Background Radiation is the afterglow of the Big Bang, consisting of low-energy microwave radiation that fills the universe.

Front

What is the Doppler Effect?

Back

The Doppler Effect is the change in frequency or wavelength of waves in relation to an observer moving relative to the source of the waves.

Front

How does the Doppler Effect apply to light waves?

Back

When light waves are emitted by a moving object, the Doppler Effect causes a change in color; if the object is moving away, the light shifts to red (redshift), and if moving closer, it shifts to blue (blueshift).

Front

What is redshift?

Back

Redshift is the phenomenon where light from an object moving away from an observer is shifted to longer wavelengths, making it appear redder.

Front

What is blueshift?

Back

Blueshift is the phenomenon where light from an object moving towards an observer is shifted to shorter wavelengths, making it appear bluer.

Front

What evidence supports the Big Bang Theory?

Back

Evidence includes the observed expansion of the universe, the abundance of light elements (Hydrogen and Helium), and the Cosmic Background Radiation.