Physics 108 test 2 (Quizes)
A hypothetical atom has five distinct energy states. Assuming all transitions are possible, how many spectral lines can this atom produce?
10
For radio reception, diffraction is _____
Helpful
The radiation curve for a "red hot" object peaks in the _______
Infrared region
Light is emitted when an electron _________
Makes a transition to to a lower energy level
Light will pass through a pair of Polaroids when their axes are _____
Parallel and 45 degrees to each other- ANSWER: either of these
A throbbing pulse of electromagnetic is called a ______
Photon
which of the following is a property of light waves, but not of sound waves?
Polarization
some double-pane airplane windows darken when the inner pane is rotated. The panes are ______
Polaroid filters
Laser light is directed at two closely-spaced slits. The distance from the first slit to a given point on the screen is exactly 2 1/2 wavelengths, and the distance from the second slit to the same point on the the screen is exactly 5 wavelengths. The light from the two slits at that point produces ___________
a dark fringe
An atom that absorbs a certain amount of energy can then emit ______
a photon of the same or lower energy
An atom that emits a certain frequency of light is __________________
an absorber of the same frequency
The fact that iron absorption lines occur in the solar spectrum directly indicates that there is iron in the solar _______
atmosphere
According to Huygens' principle, every point on a wave__________________
behaves as a source of new waves
Light from a laser is _____
coherent, in phase, monochromatic All of the above
Consider short wavelength plane waves incident upon a barrier with a relatively large opening. After passing through the opening, the waves _________
continue as plane waves
Magenta is seen at one place on a soap bubble film. At a slightly thicker region of the film, one would likely see the color _______
cyan
We now consider the Bohr model of the atom to be ___________
defective and oversimplified, but still useful.
If a proton and an electron have identical momenta, the longer wavelength belongs to the ______
electron, proton answer: both the same
The bright and dark fringes produce when light shines through two closely spaced slits are a result of_____
interference
colors seen when gasoline forms a thin film on water are a demonstration of_______
interference
In the process of fluorescence, the input is high-frequency light and the output is ________
lower-frequency light
In the photoelectric effect, the greater the frequency of the illuminating light, the greater the ______
maximum velocity of ejected electrons
Which light-emitting process is characterized by an afterglow?
phosphorescence
The Schrödinger equation is most useful for describing __________
submicroscopic particles
The quantum-mechanical probability cloud for the electron in the electron in the hydrogen atom has an average radius _______
that agrees with the orbital radius of Bohr.
The main reasons electrons occupy discrete orbits in an atom is because _______
the circumference of each orbit is an integral multiple of each electron wavelengths.
The more information one has about the energy of an electron, the less certain one is about ______
the time it has that energy
A violet-hot star emits radiation having about twice the peak frequency of radiation from a red-Hot star. The surface temperature of the hotter star is about ___________
twice that of the cooler star
Which of the following photons has the greatest energy?
ultraviolet
when traveling from one place to another, light behaves as a _______ , and when interacting with matter, light behaves as a _______.
wave; particle
