Astronomey

1.
	What is spectroscopy?   Student Response Value Correct Answer A. the use of CCDs to capture light more efficiently than with photographic film   B. a study of the geometry of rainbows   C. a method to freeze atmospheric turbulence for better resolution   D. an analysis of the way in which atoms absorb and emit light 100%   E. an observational technique to measure the brightness of light at different colors   Score: 1/1
2.
	Which of these is the classic continuous spectrum?   Student Response Value Correct Answer A. sunlight   B. a glowing nebula, such as M-42   C. a fluorescent light   D. a rainbow 100%   E. a neon light   Score: 1/1
3.
	The three laws dealing with the creation of various spectra are due to:   Student Response Value Correct Answer A. Fraunhofer.   B. Newton.   C. Einstein.   D. Kirchhoff. 100%   E. Bohr.   Score: 1/1
4.
	A neon light (thin hot neon gas in a sealed tube) gives us:   Student Response Value Correct Answer A. a few bright emission lines, telling us the gas is neon. 100%   B. nothing visible to us, but a hot of infrared lines as heat.   C. a continuous spectrum, since the neon is hot enough to glow.   D. a continuum, with dark lines identifying the neon atoms are present.   E. a lot of random bright red lines due to the motion of the hot atoms.   Score: 1/1
5.
	In the atom, which particles gives the element its identify (atomic number)?   Student Response Value Correct Answer A. neutrons   B. protons 100%   C. electrons   D. positrons   E. neutrinos   Score: 1/1
6.
	The particles which enter into chemical reactions are the atom's:   Student Response Value Correct Answer A. neutrons.   B. electrons. 100%   C. mesons.   D. positrons.   E. protons.   Score: 1/1
7.
	An emission spectrum can be used to identify a(n)   Student Response Value Correct Answer A. neutron   B. atom 100%   C. electron.   D. neutrino   E. proton   Score: 1/1
8.
	The classical model of the hydrogen atom that explains its spectral line structure is due to:   Student Response Value Correct Answer A. Bohr. 100%   B. Fraunhofer.   C. Kirchhoff.   D. Mendeleev.   E. Newton.   Score: 1/1
9.
	In Bohr's model of the atom, electrons   Student Response Value Correct Answer A. only make transitions between orbitals of specific energies. 100%   B. can be halfway between orbits.   C. are spread uniformly through a large, positive mass..   D. are not confined to specific orbits.   E. move from orbit to orbit in many small steps.   Score: 1/1
10.
	The energy required to move an electron in a hydrogen atom from energy level 1 to energy level 2 is ( see section More precisely 4-1 section of the book)   Student Response Value Correct Answer A. 12.1 eV   B. 10.2 eV   C. 13.1 eV   D. 12.75 eV   E. 13.6 eV 0%   Score: 0/1
11.
	For hydrogen, the transition from the second to the fourth energy level produces   Student Response Value Correct Answer A. an ultraviolet absorption line.   B. a red emission line.   C. an infrared emission line.   D. a blue green absorption line. 100%   E. a violet emission line.   Score: 1/1
12.
	In a hydrogen atom, a transition from the third to the second energy level will produce   Student Response Value Correct Answer A. a red emission line. 100%   B. an infrared emission line.   C. a blue green absorption line.   D. a violet emission line.   E. an ultraviolet absorption line.   Score: 1/1
13.
	The observed spectral lines of a star are all shifted towards the red end of the spectrum. Which statement is true?   Student Response Value Correct Answer A. The second law of Kirchhoff explains this.   B. The star has a radial velocity towards us.   C. This is an example of the Doppler effect. 100%   D. This is an example of the photoelectric effect.   E. The star is not rotating.   Score: 1/1
14.
	The broadening of spectral lines can be caused by:   Student Response Value Correct Answer A. thermal motion of the hot atoms.   B. density of the hot medium.   C. magnetic fields of the star.   D. rotation of the star. 0%   E. all of the above   Score: 0/1
15.
	Only a hot, thin gas can produce an emission line. Student Response Value Correct Answer False 0% True Score: 0/1
16.
	In the Bohr model, the transitions of electrons down to ground state produce the Lyman lines in the ultraviolet. Student Response Value Correct Answer True 100% True Score: 1/1
17.
	The shorter a wave's wavelength, the greater it's energy. Student Response Value Correct Answer True 100% True Score: 1/1
18.
	An X-ray photon has more energy than a visible photon. Student Response Value Correct Answer True 100% True Score: 1/1
19.
	All wavelengths of light travel at the same speed in a vacuum, and carry the same energy per photon. Student Response Value Correct Answer True 0% False Score: 0/1
20.
	Molecular spectra, like elemental ones, involve only the vibration of the particles. Student Response Value Correct Answer False 100% False Score: 1/1
21.
	Spectroscopy of a star can reveal its temperature, composition, and line-of-sight motion. Student Response Value Correct Answer True 100% True Score: 1/1
22.
	In our Sun, the spectral lines of hydrogen are weak, compared to their appearance in hotter stars. Student Response Value Correct Answer True 100% True Score: 1/1