Physical Science Test 3 Quiz and Test Answers
In class, I held up two polaroids oriented such that no light passed between them. Without moving the original two polaroids, I then inserted another polaroid between the original two such that 1/8 of the light incident on the first polaroid passed through all three polaroids. A possible orientation of the first, middle, and last polaroid axes in order
0, 45, and 90 degrees.
A hypothetical atom has four distinct energy states. Assuming all transitions are possible, how many spectral lines can this atom produce?
6
Electrons in an atom must be able to occupy metastable states in order for
A laser to work and phosphorescence to occur.
The ratio of the energy of 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
Monochromatic light is directed at two closely-spaced slits. The distance from the first slit to a given point on the screen is exactly one half wavelength greater than the distance from the second slit to the same point on the screen. The light from the two slits at that point produces
a dark fringe
An emission spectrum is characterized by
a set of discrete frequencies.
A new theory conforms to the correspondence principle when it
accounts for verified results of the old theory
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
Interference effects are less visible for thick films because the reflected waves
are too displaced to interfere
A beam of electrons has
both wave properties and particle properties
A beam of coherent light consists of photons with the same
direction, frequency, and phase
A paint pigment that absorbs red light and gives off blue light
doesn't exist
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.
A beam of monochromatic light consists of photons with the same
frequency
The radiation curve for a "white hot" object peaks in the
green region
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
Diffraction is less pronounced through relatively
large openings.
Interference is a property of
light, water, and sound waves.
According to the uncertainty principle, the more we know about a particle's momentum, the less we know about its
location
A certain object emits ultraviolet waves. If it were to emit visible light waves instead, its temperature would have to be
lower
Cyan is seen at one place on a soap bubble film. At a slightly thinner region of the film, one would likely see the color
magenta
Light is emitted when an electron
makes a transition to a lower energy level
The Bohr model of the atom is akin to a
miniature solar system
Compared to the energy of a photon of red light, the energy of a photon of blue light is
more.
The discreteness of energy levels is better understood by considering the electrons to be
none of these.
In the photoelectric effect, the brighter the illuminating light on a photosensitive surface, the greater the
number of ejected electrons
All of 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 must exist between the light source and spectroscope
The Schrodinger equation of quantum mechanics deals with two, mathematical entities: Psi, the wave function that describes where a particle _____, and Psi squared, the probability density function that describes where a particle _____.
possibly is; probably is
Waves diffract the least when their wavelength is
short
The main reason electrons occupy discrete orbits in an atom is because
the circumference of each orbit is an integral multiple of electron wavelengths
According to Huygen's Principle, wave fronts are
the overlapped crests of tiny secondary waves.
A bullet and a proton have the same speed. Which has the longer wavelength?
the proton
Polarization is a property of
transverse waves.
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 "blue hot" objects peaks in the
ultraviolet region
The polarization of axes of ordinary sunglasses are
vertical.
Which color of light carries the most energy per photon?
violet
When a certain photosensitive surface is illuminated with yellow light, no electrons are ejected. The light that will most likely to cause electrons to be ejected is
violet light
In the equation E = hf, the f stands for
wave frequency as defined for sound, radio, and light waves
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