PSH 208 / PSH208
PATTERNS COMBINED EXAM, COMPLETE TEST BANK.
In the pinhole camera, compared to the pinhole scope with the images viewed by the
... [Show More] human eye,
the camera film acts as
Selected Answer: the retina
The path of light in a uniform glass medium
Selected Answer: curves along its path
When an object emits light, the light from the object
Selected Answer: travels in all directions
If you enlarge the pinhole, does the image
Selected Answer: become dimmer
If the Sun's light were to be extinguished at this moment, in what time would we know about it. (The distance to the Sun is 1.5 x 108 km)
Selected Answer: in some minutes
The distance to the Sun is 1.5 x 108 km, the moon is much closer. If the Sun's light were to be extinguished at this moment, the reflected light from the moon would turn off
Selected Answer: in some minutes
A beam of blue light is traveling in glass and crosses into air. As the light crosses the boundary, which of the following occurs?
Selected Answer: a change in wavelength
You are in a foggy room with a flashlight looking for objects. You see the flashlight beam because the water particles
Selected Answer: reflect the light
A beam of light in air is incident on a transparent glass plate (n=1.5) that is 1.0 cm thick.
The angle of incidence is theta. Reflection occurs at the air/glass interface. Will reflection occur at the glass/air interface (the opposite side of the glass plate)?
Selected Answer: Yes
When you place a transparent glass object in an oil-filled container, the view of the object will disappear when the object and oil have:
Selected Answer: the indices of refraction matched
You are in a dark room with a flashlight looking for an object on a black wall. In order for you to see the object, it must
Selected Answer: reflect the light
You are in a foggy room with a flashlight looking for an object on a black wall. In order for you to see the beam, it must
Selected Answer: reflect the light
You can make a telescope with a convex lens and a
Selected Answer: concave lens
Ray tracing allows
Selected Answer: us to find the focal length
If you have a light source at a distance from a convex lens, the projected image on paper appears
Selected Answer:
inverted
To find the focal length of a lens, you measure the distance from the lens to a point where
Selected Answer: light from an overhead lamp comes to a sharp focus
If you have a light source a distance from a lens you project the image on a sheet of paper, the images appears inverted for a:
Selected Answer: convex
lens
The magnification of a convex lens compared to a Fresnel lens:
Selected Answer: can be the same
The major mechanism for the absorption (loss) of a photon is the "photoelectric" effect which is described by?
Selected Answer: an electron gaining energy from a photon.
Sound can be described as
Selected Answer: vibrations of air molecules
Compared to an electron a photon
Selected Answer: can be destroyed
Microwaves are part of the electromagnetic spectrum. Compared to photons of visible light, a microwave has?
Selected Answer: all of the above
Photons with millions of electron Volts of energy can create
Selected Answer: electrons
Light can be described as having wave-like behavior and
Selected Answer: particle-like behavior
The word "photon" can be used to describe?
Selected Answer: particle of light
What colors are used in a T.V. color monitor?
Selected Answer: red, blue and green
White light incident on a flat mirror obeys the relation that the angle of incidence equals the angle of reflection. Does red light incident on the mirror follow the same relation?
Selected Answer: Yes
The ultraviolet portion of the sun's spectrum
Selected Answer: both of the
above
In the electromagnetic spectrum, as the radiation changes from x-rays to visible light, the velocity
Selected Answer:
decreases
When a pure blue object is illuminated with red light, the object appears
Selected Answer:
black
The water droplets in the clouds that sunlight is reflected from are
Selected Answer: many times larger than the wavelength of visible light
White clouds have many droplets that reflect the light so that the clouds scatter
Selected Answer: about half of the light
The observer's shadow is the center of the arc of the
Selected Answer:
rainbow
If you observe a white-light flashlight by looking directly through a water-filled container that is milky colored with milk droplets, the flashlight color is
Selected Answer: yellow-red
When you look at a rainbow, compared to the sky inside the rainbow, the sky outside the rainbow appears
Selected Answer: darker
The amount of reflect light incident on two transparent materials depends on differences in
Selected Answer: refractive indices
Compared to the dimensions of the wavelength of light,particles that preferentially scatter blue light are
Selected Answer: smaller
John Tyndall demonstrated that fine dust particles could lead to preferential scattering of
Selected Answer: blue light
Light going from lower refractive index air to high refractive index glass has a phase change in the reflected beam of
Selected Answer: one-half wavelength
A single wavelength light beam incident on a thin film can have the reflected beam either reinforced diminished depending on
Selected Answer: all of the above
In polarized light, the photon carries away
Selected Answer: one unit of angular momentum
White light can be produced by two colors.
Selected Answer: Yes
An unpolarized beam of light can be represented by two vector components of wave oscillations oriented
Selected Answer: parallel to each
other
For light incident on water, is there a Brewster's Angle for fully polarized reflected light?
Selected Answer: Yes
If you take two polarizer films that are transparent to light and you cross them by 90 degrees, the pair will
Selected Answer: remain transparent
In solid silicon the outermost electrons are bound by energies of 1.1 eV. Light is absorbed in
Selected Answer: visible portion of the spectrum
In light emission, if the electrons have well-defined energy levels, you observe
Selected Answer: line spectra
Light can be described by particle-like behavior or
Selected Answer: wave-like behavior
If you use an optical spectrometer to observe an incandescent lamp you see
Selected Answer: a broad spectrum from red to blue
The difference between infrared and visible light emission is that in infrared light
Selected Answer: energies are lower
If you punched a second hole in the foil of the scope, how many images do you see in the viewer?
Selected Answer: one
Correct Answer: two
If we consider the hum eye as a pinhole camera with the image of a three projected on the back of the eye (the "retina"), the image would be
Selected Answer: inverted (upside down)
Correct Answer: inverted (upside down)
Based on your experiences in the Activity, the pinhole scope images become less clear if you
Selected Answer: make three pinholes
Correct Answer: enlarge the pinhole
If the Sun's light were to be extinguished at this moment, we would know about it
Selected Answer: in 8 minutes
Correct Answer: in 8 minutes
Based on your experiences in the Activity, if you enlarge the pinhole, does the image
Selected Answer: remain
unchanged?
Correct Answer: become less clear?
If you punched three holes in the foil of the scope, how many images do you see in the viewer?
Selected Answer: one
Correct Answer: three
The velocity of light in water, compared to the velocity in air
Selected Answer: is slower
Correct Answer: is slower
If you punched thousands of holes in the aluminum foil of the scope (so there were more "holes" than "foil"), how many imageswould you see in the viewer?
Selected Answer: one large blurry image
Correct Answer: one large blurry image
The velocity of white light in a uniform transparent medium
Selected Answer: is constant for all colors
Correct Answer: is constant for all colors
When you view an object with a pinhole scope, the object is inverted. If you rotate the scope 180 degrees, the image is
Selected Answer: still inverted
Correct Answer: still inverted
You are in a foggy room with a flashlight looking for an object on a black wall. In order for you to see the beam, it must
Selected Answer: reflect the light
Correct Answer: reflect the light
In the Bent Pencil Activity, the pencil appeared bent because
Selected Answer: the indices of refraction changed
Correct Answer: the indices of refraction changed
When a beam of light in air is incident on water, the energy does not change at the interface
when the beam
Selected Answer: neither of the above
Correct Answer: both the above
A beam of red light is incident on a glass plate. Will the beam transmitted through the glass plate emerge parallel to the incident beam?
Selected Answer: Yes
Correct Answer: Yes
A beam of light in air passes the air/glass boundary. What does not change?
Selected Answer: energy
Correct Answer: energy
Total internal reflection can occur when a beam of light
Selected Answer: in glass is incident on air
Correct Answer: in glass is incident on air
A beam of light in air is incident on a transparent glass plate. Reflection occurs at the air/glass interface. Will reflection occur at the glass/air interface (the opposite side of the glass plate)?
Selected Answer: No
Correct Answer: Yes
When you place a transparent glass object in an oil-filled container, the view of the object will disappear when the object and oil have:
Selected Answer: the indices of refraction matched
Correct Answer: the indices of refraction matched
A beam of light, containing many individual light beams, incident on a flat aluminum foil reflects from the mirror-like surface so that the angle of incidenceequals the angle of reflection. You wrinkle the foil. Would individual light beams obey the law of reflection in this case?
Selected Answer: No
Correct Answer: Yes
A beam of blue light in air is incident on a glass plate. Will the transmitted beam emerge shifted laterally (sideways) from the direction of the incident beam?
Selected Answer: No
Correct Answer: Yes
The weight of the lens is one advantage of using a Fresnel plastic lens of the same focal length over that of a:
Selected Answer: convex
lens
Correct Answer: convex lens
If you have two convex lenses with different curvatures, which has the shorter focal length?
Selected Answer: the lens with the greater curvature (more rounded)
Correct Answer: the lens with the greater curvature (more rounded)
If you have two convex lenses with different focal lengths, which has the smaller magnification?
Selected Answer: the lens with the larger focal length
Correct Answer: the lens with the larger focal length
If you have two convex lenses with different curvatures, which has the longer focal length?
Selected Answer: the lens with the smaller curvature (less rounded)
Correct Answer: the lens with the smaller curvature (less rounded)
A planar concave lens is a curved, circular glass that is
Selected Answer: flat on one side
Correct Answer: flat on one side
If you have two different convex lenses with the same focal lengths and you focus the sun's light on a piece of paper, which causes the faster heating?
Selected Answer: the larger diameter lens
Correct Answer: the larger diameter lens
Ray tracing allows
Selected Answer: us to see the path of light
Correct Answer: us to see the path of light
A concave lens is a curved, circular glass that is
Selected Answer: thinner in the center and thicker at the edge
Correct Answer: thinner in the center and thicker at the edge
If you have a light source a distance from a convex lens and you project the image on a sheet of paper, does the image appear
Selected Answer: inverted
Correct Answer: inverted
For an image projected through a lens onto paper, the image is
Selected Answer: neither virtual nor real
Correct Answer: a real image
A particle without charge and mass is characteristic of a
Selected Answer: photon
Correct Answer: photon
An electron and positron can recombine with each other and create
Selected Answer: a photon
Correct Answer: a photon
A photon is absorbed and vanishes (or dies) with?
Selected Answer: all of the above
Correct Answer: an electron gaining energy
The word "photon" can be used to describe?
Selected Answer: particle of light
Correct Answer: particle of light
Microwaves are part of the electromagnetic spectrum. Compared to photons of visible light, a microwave has?
Selected Answer: all of the above
Correct Answer: all of the above
A positron has
Selected Answer: all of the above
Correct Answer: all of the above
The word "photon" can be used to describe?
Selected Answer: All of the above.
Correct Answer: All of the above.
An electron gaining energy describes:
Selected Answer: photon absorption
Correct Answer: photon absorption
The major mechanism for the absorption (loss) of a photon is an electron gaining energy from a photon. This is described as
Selected Answer: Photoelectric effect
Correct Answer: Photoelectric effect
A photon is emitted (created) with?
Selected Answer: an electron losing energy.
Correct Answer: an electron losing energy.
Fluorescent lamps have mercury vapor which emits uv radiation. The tube is coated with phosphors which produce
Selected Answer: visible light
Correct Answer: visible light
The spectrum of light emitted by the sun
Selected Answer: all of the above
Correct Answer: all of the above
There are three ways to produce light of a given hue: two spectral colors, three spectral colors or
Selected Answer: one hue plus
white
Correct Answer: one hue plus
white
What colors are used in a T.V. color monitor?
Selected Answer: red, blue and green
Correct Answer: red, blue and green
A wavelength of red light is 680 nanometers (nm). Is this wavelength longer or shorter than a wavelength of blue light?
Selected Answer: longer
Correct Answer: longer
In the electromagnetic spectrum, as the radiation changes from x-rays to visible light, the wavelength
Selected Answer: decreases
Correct Answer: increases
When a pure blue object is illuminated with red light, the object appears
Selected Answer: blue
Correct Answer: black
The flourescent lights in the ceiling have a continuous spectrum and a bright line in the
Selected Answer: green
Correct Answer: green
Visible light is composed of photons in the energy range of around
Selected Answer:
Correct Answer: 2 to 3 electron volts
2 to 3 electron volts
Question 1 of 1 points
10
Representing visible light by waves, the wavelength is
Selected Answer: the distance from one wave crest to the next
Correct Answer: the distance from one wave crest to the next
The observer's shadow is the center of the arc of the
Selected Answer: Correct Answer:
rainbow rainbow
The sky is blue because sunlight is scattered by
Selected Answer: air molecules
Correct Answer: air molecules
If you are admiring a raindrop with a friend you are each seeing
Selected Answer: the same rainbow
Correct Answer: a different rainbow
In a rainbow, each color emerges at different angles: red light emerges at 42 degrees, blue light at
Selected Answer: about the same
angle
Correct Answer: a smaller angle
The color sequence (red -> blue) of a rainbow would change if
Selected Answer: none of the
above
Correct Answer: none of the
above
When you look at a rainbow, compared to the sky inside the rainbow, the sky outside the rainbow appears
Selected Answer: darker
Correct Answer: darker
If the molecules in the air did not scatter light and we were looking away from the sun, the color of the sky would be
Selected Answer: black
Correct Answer: black
The presence of colors in a rainbow shows the inner ring is
Selected Answer: Correct Answer:
blue blue
When you have two rainbows, the outer ring of the second (outer) rainbow is
Selected Answer: Correct Answer:
blue blue
When observing a rainbow the region within the rainbow is
Selected Answer: lighter than the sky outside the rainbow
Correct Answer: lighter than the sky outside the rainbow
The amount of reflect light incident on two transparent materials depends on differences in
Selected Answer: refractive
indices
Correct Answer: refractive indices [Show Less]