Phys108 Test3
A hypothetical atom has four distinct energy states. Assuming all transitions are possible, how many spectral lines can this atom produce
6
Monochromatic light directed at 2 closely spaced slits produces
Dark fringe
The planetary model of the atom helps us understand light
Emission
Interference colors in a soap bubble give evidence that the soap film
Has two reflecting surfaces & Is thin
For radio reception, diffraction is
Helpful
Diffraction is less pronounced through relatively
Large openings
Light is emitted when an electron
Makes a transition to a lower energy level
Compared to the energy of a photon of red light, the energy of a photon of blue light is
More ROYGBV
All of the light that passes through one Polaroid will pass through a second Polaroid with an axis
Parallel to the first
The ratio of the energy of a photon to its frequency is
Planck's constant
Unpolarized light shined on a Polaroid
Shines 50% of the light
According to Huygen's Principle, wave fronts are
The overlapped crests of tiny secondary waves
We understand polarization and interference
Through the wave model
Polarization is a property of
Transverse waves
The polarization axes of ordinary sunglasses are
Vertical
Interference is a property of
Water, light, & sound waves
Magenta is seen at one place on a soap film. At a slightly thinner region of the film, one would likely see the color
Yellow
An emission spectrum is characterized by
a set of discrete frequencies
A rainbow or incondescent spectrum is characterized by
a smooth, continuous pattern of a range of frequencies
A new theory conforms to the correspondence principle when it
accounts for verified results of the old theory. EX: Newton Mechanics and Quantum Mechanics
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
Inteference effects are less visible for thick films because the reflected waves
are too displaced to interfere.
Electrons in an atom must be able to occupy metastable states in order for
both a laser to work and phosphorescence to occur
A beam of electrons has
both particle properties and wave properties
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
A beam of monochromatic light consists of photons with the same
frequency
A beam of coherent light such as a laser consists of photons with the same
frequency, phase, and direction
The radiation curve for a "White Hot" object peaks in the
green region
Light is absorbed when an electron
is boosted to a higher energy level
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 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
The Bohr model of the atom is akin to a
miniature solar system
In the photoelectric effect, the brighter the illuminating light on a photosensitive surface, the greater the
number of ejected electrons
A condition necessary for absorption spectra to exist is that
partially absorbent material exist between the light source and spectroscope
The Schrodinger equation of quantum mechanics deals with two mathematical entities. the wave function describes where a particle ____ and the probability density function describes where a particle _____
possibly is; probably is
Laser light
produces a bright fringe
Waves diffract the least when their wavelength is
short
A bullet and a proton have the same speed but the one with the greater momentum and mass is
the bullet
A bullet and a proton have the same speed but the one with the longer wavelength is
the proton
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
Blue hot peaks in the
ultraviolet region
Which color of light carries the most energy per photon?
violet
In the E=hf, the f stands for
wave frequency as defined for sound, radio, and light waves
The discreteness of energy levels is better understood by considering the electrons to be
waves (none of these)