Physics Chapter 29
A hypothetical atom has five distinct energy states. Assuming all transitions are possible, how many spectral lines can this atom produce?
10
an ideal Polaroid will transmit 50% of non-polarized light on it. How much light is transmitted by two ideal Polaroids that are oriented with their axes parallel to each other?
50%
A hypothetical atom has four distance energy states. Assuming all transitions are possible, how many spectral lines can this atom produce?
6
The ratio of the energy of a photon to its frequency is
Planck's constant
Laser light is directed at two closely-spaced slits. The distance from the first slit to a given point on the screen is exactly 11 wavelengths, and the distance from the second slit to the same point on the screen is exactly 22 wavelengths. The light from the two slits at that point produces
a bright fringe
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 screen is exactly 5 wavelengths. The light from the two slits at that point produces
a dark fringe
an incandescent spectrum is characterized by
a smooth, continuous pattern of a range of frequencies
The dark lines in the sun's spectrum represent light that is
absorbed by the sun's atmosphere
an atom that emits a certain frequency of light is
an absorber of the same frequency
The main visible difference between phosphorescent and fluorescent materials is
an afterglow
quantum uncertanties are more predominant for simultaneously measuring speed and location of
an electron
the discrete spectral lines produced in class by placing high voltage across a tube of neon gas are an example of
an emission spectrum
Interference effects are less visible for thick films because the reflected waves
are too displaced to interfere
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
the coolest star is the start that glows
blue
when light is absorbed an electron is
boosted to a higher energy level
a bullet and a proton have the same momentum. which has the longer wavelength
both have the same wavelength
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
In photoelectric effect, doubling the frequency of incident light will cause the maximum energy of ejected electrons to
double
Heavy atoms are not appreciably larger in size than light atoms because the nuclei of heavy atoms have more
electric charge
the planetary model of the atom helps us understand light
emission
Consider long wavelength plane waves incident upon a barrier with a relatively small opening. After passing through the opening, the waves
fan out
a beam of monochromatic light consists of photons with the same
frequency
the energy of a photon depends on its
frequency
discrete spectral lines occur when excitation takes place in a
gas
Interference colors in a soap bubble give evidence that the soap film
has two reflecting surfaces AND is thin
For radio reception, diffraction is
helpful
a certain object emits infrared waves. If it were to emit visible light waves instead, its temperature would have to be
higher
the glare seen from water is largely
horizontally polarized
light from a laser is
in phase, coherent, and monochromatic
Light from a laser is
in phase, monochromatic, and coherent
which of the following photons has the least energy
infrared
colors seen when gasoline forms a thin film on water are a demonstration of
interference
diffraction is a result of
interference
Interference is a property of
light waves, water waves, and sound waves
a certain object emits ultraviolet waves. If it were to emit visible light waves instead, its temperature would have to be
lower
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
all the light that passes through one Polaroid will pass through a second Polaroid with an axis
parallel to the first
A condition necessary for absorption spectra to exist is that
partially absorbent material exist between the light source and spectroscope
Some light switches glow in the dark after the lights are turned off. This is because of
phosphorescence
some light switches glow in the dark after the lights are turned off. this is because of
phosphorescence
which experiment best demonstrates the particle-like nature of light?
photoelectric effect
atoms can be excited by
photon absorption, electron impact, and thermal agitation
which of the following is a property of light waves, but not of sound waves?
polarization
The Schrodinger equation of quantum mechanics deals with two, mathematical entities: [symbol], the wave function that describes where a particle ____ and [absolute value of symbol squared], the probability density function that describes where a particle ____
possibly is; probably is
According to the correspondence principle, a new theory is valid if it
predicts the same correct results as the old theory
according to the correspondence principle, a new theory is valid if it
predicts the same correct results as the old theory, overlaps and agrees where the old theory works, and accounts for confirmed results from the old theory
an excited atom decays to its ground state and emits a photon of green light. if instead the atom decays to an intermediate state, then the light emitted could be
red
consider the interference colors seen in a film of gasoline on a wet street. The function of the water is to provide a
second reflecting surface
the invisible message that i wrote in class with fluorescent crayons became visible when
shone ultraviolet light on the message
when long-wavelength light is seen in the interference colors of a soap bubble, the wavelength being cancelled is relatively
short
diffraction is more pronounced through relatively
small openings
compared the the average diameter of a hydrogen atom, a helium atom is
smaller
the quantum-mechanical probability could for the electron in the hydrogen atom has an average radius
that agrees with the orbital radius of bohr
An excited atom is an atom
that has one or more displaced electrons
an excited atom is an atom
that has one or more displaced electrons
An electron and a baseball move at the same speed. Which has the shorter wavelength?
the baseball
the main reason electrons occupy discrete orbits in an atom is because
the circumference of each orbit is an integral multiple of electron wavelengths
an electron and a baseball move at the same speed. which has the longer wavelength
the electron
the energy of a photon is related to
the energy level difference through which it falls, its frequency, and the energy given to the atom that emits it
the more information one has about the energy of an electron, the less certain one is about
the time it has that energy
light behaves primarily as a wave when it
travels from one place to another
Fluorescent materials on display in museums are illuminated with
ultraviolet light
the radiation curve for a "white hot" object peaks in the
ultraviolet region
Quantization of electron energy states in an atom is better understood in terms of the electron's
wave nature
When traveling from on place to another, light behaves as a ____ and when interacting with matter, light behaves as a ____
wave; particle
when traveling from one place to another, light behaves as a ___, and when interacting with matter, light behaves as a ____
wave; particle
if the radiation curve for an incandescent object peaks in the green region, the object would appear
white
Magenta is seen at one place on a soap bubble film. At a slightly thinner region of the film, one would likely see the color
yellow
