Stellar Spectra

Front

What is a stellar spectrum?

Back

A stellar spectrum is the range of electromagnetic radiation emitted by a star, which can be analyzed to determine its composition, temperature, density, and motion.

Front

What are the main types of spectra?

Back

The main types of spectra are continuous spectra, emission spectra, and absorption spectra.

Front

What is the difference between emission and absorption spectra?

Back

Emission spectra are produced when atoms emit light at specific wavelengths, while absorption spectra occur when atoms absorb light at specific wavelengths.

Front

How do you determine the composition of a star using its spectrum?

Back

By analyzing the absorption lines in a star's spectrum, scientists can identify the elements present based on their unique spectral signatures.

Front

What is the significance of the Doppler effect in astronomy?

Back

The Doppler effect helps determine the motion of stars and galaxies by observing shifts in the wavelengths of their emitted light.

Front

What is the relationship between wavelength and frequency?

Back

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

Front

What is the electromagnetic spectrum?

Back

The electromagnetic spectrum is the range of all types of electromagnetic radiation, including visible light, radio waves, X-rays, and gamma rays.

Front

What color of light has the longest wavelength?

Back

Red light has the longest wavelength in the visible spectrum.

Front

What color of light has the shortest wavelength?

Back

Violet light has the shortest wavelength in the visible spectrum.

Front

How many protons does helium have?

Back

Helium has 2 protons.