The Big Bang Theory - Midterm Review

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

What does redshift indicate about a galaxy's movement?

Back

Redshift indicates that a galaxy is moving away from the observer, as the light waves are stretched to longer wavelengths.

Front

What does blueshift indicate about a galaxy's movement?

Back

Blueshift indicates that a galaxy is moving towards the observer, as the light waves are compressed to shorter wavelengths.

Front

What is the Cosmic Microwave Background Radiation (CMB)?

Back

The CMB is the afterglow radiation from the Big Bang, filling the universe and providing evidence of its early hot and dense state.

Front

What is the most abundant element in the universe?

Back

Hydrogen is the most abundant element in the universe, making up about 75% of its elemental mass.

Front

How does the wavelength of light change as a source moves away from an observer?

Back

As a source moves away from an observer, the wavelength increases and the frequency decreases.

Front

What is the significance of the Andromeda Galaxy's blueshift?

Back

The blueshift of the Andromeda Galaxy indicates that it is moving towards Earth, which is significant for understanding the dynamics of our local group of galaxies.

Front

What happens to microwaves as the universe expands?

Back

As the universe expands, microwaves will redshift to radiowaves.

Front

What can be concluded from a galaxy showing greater redshift than nearby galaxies?

Back

It can be concluded that the galaxy is moving away faster than closer galaxies.

Front

What is the relationship between frequency and wavelength in light?

Back

Frequency and wavelength are inversely related; as wavelength increases, frequency decreases, and vice versa.