Physics 18, 19, 27 Review
Nauseen wants to observe the phenomenon of interference with dark and bright fringes. what kind of light source should she use to obtain the interference pattern?
coherent light
when a photon is scattered, the increase in wavelength is called the:
compton effect
when the light falls on a soap bubble or on the oily film spread on a water puddle, a spectrum of colors is observed. How is this spectrum of colors formed?
constructive and destructive interference of light waves
Which optical instrument produces a magnified, virtual, and inverted image of small objects?
a microscope
which of the following statements in incorrect?
a photon has energy but no momentum
A rainbow is an example of __________.
all of the above
which property is a characteristic of single slit diffraction but not double slit diffraction?
bands get thinner farther from the band
an example of an electromagnetic wave is
light
what is the most likely outcome of increasing the number of slits per unit distance on a diffraction grating?
lines become narrower
in 1916 Einstein predicted what particle property of photons?
momentum
in an interference pattern of a double slit experiment, why does a bright band occur where constructive interference takes place?
the two wave fronts have a phase difference of one wavelength
which of the following statements about threshold frequency is correct?
threshold frequency depends on the work function of a metal
Atoms emit radiation only when their vibrational energy changes
true
Descartes and Snell worked around the time of Kepeler and Galileo
true
The virtual image of a lens is always on the same side of the lens as the object.
true
a concave lens causes light to diverge
true
a convex lens is used to obtain an enlarged virtual image
true
a transmission grating consists of many fine lines placed on a transparent medium such as glass or plastic
true
electrons exhibit wave properties such as diffraction
true
for a convex lens to form a virtual image the object must be located at some distances less that the focal length
true
in a single-slit diffraction, the central band gets thicker as the distance to the screen increases
true
in a single-slit diffraction, the central band gets thinner as the width of the slit increases.
true
light from two different flashlights does not produce an interference pattern because it is incoherent
true
light rays that are reflected twice inside a rain water droplet can produce a second-order rainbow
true
monochromatic light is light of a single frequency
true
the image produced by a concave lens is always virtual
true
the magnification for a concave lens is always reduced
true
total internal reflection occurs when light moves from an area of higher index of refraction to one of lower index and strikes the boundary at an angle greater than the critical angle
true
Drawing a ray diagram for an object far from convex lens requires how many rays?
two
A concave lens always produces what type of image?
virtual
the energy of a photon is inversely proportional to its _________
wavelength
when electromagnetic radiation above the threshold frequency falls on an object, it emits electrons:
without any time delay
which is the most reasonable slit spacing for a transmission diffraction grating?
1000 nm
if an object is placed at twice the focal length of a convex lens, where is the image located on the other side of the lens?
2 f
rainbows occur at _____________
40-42 degrees above the horizon
which scientist proved experimentally that a shadow of the circular object illuminated with coherent light would have a central bright spot?
Arago
which function correctly expresses how to determine the energy of a photon?
E= hf
which principle states that it is impossible to measure precisely both the position and momentum of a particle at the same time?
Heisenberg uncertainty principle
James Maxwell's experiments were proven to be correct through the work of
Hertz
which scientist proposed a mathematical solution for the wave nature of light?
Fresnel
which is a coherent source of light?
an invisible laser beam
the de Broglie equation shows that subatomic particles have properties that
are wave like
what is the most likely outcome of decreasing the wavelength of incident light on a diffraction grating?
distance between lines decreases
if an object is placed at twice the focal length of a convex lens, what is the position of the image?
behind the lens and inverted
a magnifying glass is an example of ___________
both a and b
electromagnetic waves have properties that are
both a and b
the Compton effect supports
both models of light
in Young's double-slit experiment using monochromatic light, the interference pattern consists of a central ________
bright band with alternate dark and bright bands on either side
what is the most likely outcome of decreasing the frequency of incident light on a diffraction grating?
distance between lines increases
which of the following objects can set a piece of paper on fire in the presence of sunlight?
convex lens
how can the distance between the first bright band and the central band be increased in a double slit experiment?
decrease the slit separation, increase the distance between of the screen from the slits, and increase the wavelength
Joe observes the photo impressions of patterns produced by a single-slit diffraction and a double-slit interference experiment. He concludes that the bright central band and evenly spaced dark and light bands on either side belong to the single-slit diffraction experiment. Moreover, the wide bright central band with narrow dimmer bands on either side belongs to the double-slit interference experiment.
false
an electron and a proton move with the same speed. the proton has the longer de Broglie wavelength
false
rainbows are formed because all colors of light bend the same amount when they enter a medium
false (different)
a concave lens causes light to converge
false (diverge)
the emission of electrons from a metallic surface depends on the intensity of the incident radiation
false (frequency)
as temperature decreases, the frequency at which a hot body emits the maximum amount of energy increases
false (increases)
a positive magnification means the image is inverted compared to the object
false (larger)
magnifications with values greater than one represent images that are smaller than the object
false (larger)
the bright band that occurs at m= 1 is called the central bright band
false (m= 0)
the image produced by a convex lens is always real
false (or virtual)
the integer value "n" in the equation for energy of vibration can have any value
false (positive numbers)
the colorful surface of a CD or DVD is the result of a transmission grating
false (reflection)
second order rainbows have the colors in the same order as the primary, brighter rainbow
false (reverse)
the magnification for a convex lens in always enlarged
false (sometimes)
in a single-slit diffraction, the central band gets thinner as the wavelength increases
false (thicker)
the lens of the eye has a fixed focal length
false (variable)
in Compton's experiment most scattered X-rays were uncharged, while others
had larger wavelengths
the photoelectric effect demonstrates that a photon
has kinetic energy only
in the Compton effect, the scattered photons
have less energy than the unscattered photons
which is likely to produce the brightest spectra?
holographic gratings
which of the following phenomena contradicted Maxwell's electromagnetic wave theory?
hot body emission spectrum
the energy of a photon is:
inversely proportional to its wavelength
when viewing an object through a microscope, the image will appear __________
inverted and larger than the object
when an object is placed at a distance greater than twice the focal length of the lens, the real image produced is __________
inverted and smaller than the object
an example of when total internal reflection occurs is when all the light passing from a region of higher index of refraction to a region of lower index of refraction
is reflected back into the region of higher index
in the photoelectric effect, light displays properties that are like a _____
particle
a device which causes a door to automatically open is an example of light displaying properties that are _______
particle like
which phenomenon demonstrates the particle nature of light?
photoelectric effect
what produces a color spectrum when white light reflects off the surface of a CD?
reflection grating
the wavelength of light in a medium is _______ the wavelength of light in a vacuum
shorter than
which phenomenon is not the result of thin film interference?
stained glass windows
how can Ali distinguish the diffraction pattern created by diffraction grating and the interference pattern produced by a double slit?
the interference pattern from a diffraction grating will have a narrow, equally spaced bright lines, and the interference pattern will have bright and dark bands
The constant "n" in Snell's Law of Refraction depends upon
the materials involved
the de Broglie wavelength of a particle is inversely proportional to:
the momentum of the particle
For a convex lens to produce a real, enlarged, inverted image which of the following must be true?
the objects distance must be greater than one focal length but less than twice the focal length
the wavelengths of light seen in a rainbow depend upon ____________
the relative positions of the sun, the water droplets, and the observer