Star Spectra Practice

Front

What elements are primarily found in the sun?

Back

Helium and hydrogen.

Front

What do emission and absorption spectra help us identify in stars?

Back

The composition of stars.

Front

What is an absorption spectrum?

Back

A spectrum that shows dark lines where light has been absorbed by elements in a star's atmosphere.

Front

What is an emission spectrum?

Back

A spectrum that shows bright lines where light is emitted by elements in a star.

Front

What does blue shifting in a spectrum indicate?

Back

An object is moving towards the observer.

Front

What is a continuous spectrum?

Back

A spectrum that shows all colors of light without any gaps.

Front

What is a black body spectrum?

Back

The spectrum emitted by an idealized perfect black body that absorbs all incident radiation.

Front

What is the primary use of spectroscopy in astronomy?

Back

To analyze the light from stars and determine their properties.

Front

What can the temperature of a star be inferred from?

Back

The color of the star and its spectrum.

Front

What is the Doppler effect?

Back

The change in frequency or wavelength of light from an object due to its motion relative to the observer.