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