Astronomy

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Spectral-line Analysis, Chpt 4 (J)

protons

IN the atom, which particles gives the element its identify (atomic number)?

a rainbow

Which of these is the classic continuous spectrum?

Zeeman Effect

The splitting of spectral lines in the presence of strong magnetic fields is the

radio

Which of the following type of electromagnetic radiation has the lowest energy?

True

Only a hot, thin gas can produce an emission line.

radio or microwave telescopes

Since the difference in energy between the different rotational states a molecule is very small, many molecular lines can be observed with

True

The shorter a wave's wavelength, the greater it's energy.

False

The larger the red shift, the faster the distant galaxy is rushing toward us.

False

Molecular spectra, like elemental ones, involve only the vibration of the particles.

a red emission line

In a hydrogen atom, a transition from the third to the second energy level will produce

What is spectroscopy

An analysis of the way in which atoms absorb and emit light.

This is an example of the Doppler Effect

The observed spectral lines of a star are all shifted towards the red end of the spectrum. Which statement is true?

Molecules can vibrate and rotate as well

Why are molecular lines more complex than elemental spectral lines?

a few bright lines against a dark background

The Orion Nebula, M-42, is a hot, thin cloud of glowing gas, so its spectrum is

13.6 eV

The energy required to ionize a hydrogen atom whose electron is in the ground state (energy level1) is

chemical composition, whether it has a strong magnetic field, its radial motion, its temperature

What information about an astronomical object can be determined by observing its spectrum?

absorption lines due to the thin outer layer above the photosphere

The Fraunhofer lines in the solar spectrum are actually

a rainbow,but with some dark lines mixed in

Typical stellar spectra appear as

atom

An emission spectrum can be used to identify a (n)

density of the hot medium, magnetic fields of the star, rotation of the star, thermal motion of the hot atoms

The broadening of spectral lines can be caused by

added an electron to the outer electron shell

To have a negative ion, you must have

their magnetic fields

According to the Zeeman Effect, the splitting of a sunspot's spectral lines is due to

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