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