Star Spectra

Front

What does a blue shift in a star's light indicate?

Back

The star is moving towards the Earth.

Front

What do we primarily use emission/absorption spectra to identify in stars?

Back

The composition of stars.

Front

What is the term for the spectrum that shows blue shifting?

Back

Blue shifting is observed in the spectrum of a star moving towards the observer.

Front

Which elements are present in a star's spectrum if it shows lines corresponding to elements D and Z?

Back

Elements D and Z are present in the star's spectrum.

Front

If a star's light is red-shifted, what does this imply?

Back

The star is moving away from the Earth.

Front

What is the electromagnetic spectrum?

Back

The range of all types of electromagnetic radiation, including visible light.

Front

What is the significance of absorption lines in a star's spectrum?

Back

Absorption lines indicate the presence of specific elements in the star's atmosphere.

Front

What is the difference between emission and absorption spectra?

Back

Emission spectra show bright lines on a dark background, while absorption spectra show dark lines on a continuous spectrum.

Front

How can astronomers determine the temperature of a star?

Back

By analyzing the spectrum of the star and using Wien's Law.

Front

What is the Doppler effect in relation to star spectra?

Back

The Doppler effect causes the observed wavelength of light from a star to shift depending on its motion relative to the observer.