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