Light Years, Red Shift and Blue Shift

Front

What is a light year?

Back

A light year is the distance that light travels in one year, approximately 5.88 trillion miles.

Front

How long does it take for light from Proxima Centauri to reach Earth?

Back

4.3 years.

Front

What does a blueshift indicate about an object in space?

Back

A blueshift indicates that the object is moving closer to the observer.

Tags

NGSS.HS-ESS1-2

NGSS.HS-ESS1-4

Front

What happens to the wavelength of light during a blueshift?

Back

The wavelength decreases.

Front

What does a redshift indicate about an object in space?

Back

A redshift indicates that the object is moving away from the observer.

Tags

NGSS.HS-ESS1-2

Front

What happens to the wavelength of light during a redshift?

Back

The wavelength increases.

Tags

NGSS.HS-PS4-1

Front

What does the redshift of galaxies tell us about the universe?

Back

It tells us that the universe is expanding.

Tags

NGSS.HS-ESS1-2

Front

What is the relationship between redshift and distance in the universe?

Back

Generally, the greater the redshift, the farther away the galaxy is.

Tags

NGSS.HS-ESS1-2

Front

What is wavelength in the context of light waves?

Back

Wavelength is the distance between successive crests of a wave.

Tags

NGSS.HS-PS4-1

Front

What is the blue section of a light wave measuring?

Back

Wavelength.

Tags

NGSS.HS-PS4-1