MULTIPLE CHOICE. Choose the one alternative that best
completes the statement or answers the question.
1)A beam of light in air
enters a glass slab with an index of refraction of 1.40 at an angle of
incidence of 30.0e. What is the angle of refraction?
A) 14.9e B) 20.9e C)
47.5e
D) 30.0e
Answer: B
2)In a double-slit
interference experiment you are asked to use laser light of different
wavelengths and determine
the separation between adjacent maxima. You observe that this
separation is greatest when
you illuminate the double slit with
A) red light.
B) green light.
C) blue light.
D) The separation is the
same for all wavelengths.
Answer: A
3)In a single-slit
diffraction experiment, a beam of monochromatic light of wavelength 640 nm is incident on a slit of
width 0.400 mm. If the
distance between the slit and the screen is 1.80 m,
what are the positions of
the first dark fringes?
A) 0.870 x 10-3 m B) 1.65 x 10-3 m
C) 1.30 x
10-3 m D) 2.88 x
10-3 m
Answer: D
4)A beam of light that is
parallel to the principal axis is incident on a concave mirror. What
happens to the reflected
beam of light?
A) It is perpendicular to
the principal axis.
B) It passes through the
focal point of the mirror.
C) It passes through the
center of curvature of the mirror.
D) It also is parallel to
the principal axis.
Answer: B
5)You are given two
diffraction gratings, one with 5500 lines per cm, and the other with 6700
lines per cm. In order to
obtain the maximum possible dispersion you would use
A) the 6700 lines per cm
grating.
B) the 5500 lines per cm
grating.
C) Both gratings produce
the same dispersion.
D) Dispersion cannot be
defined when diffraction gratings are employed.
Answer: A
6)Which one of the
following is not a characteristic of a simple two-lens astronomical refracting
telescope?
A) The objective forms a
virtual image.
B) The final image is
inverted.
C) The angular size of the
final image is larger than that of the object.
D) The final image is
virtual.
Answer: A
7) Two coherent light sources are characterized by
A) having the same
frequency.
B) having the same
amplitude.
C) having the same
wavelength.
D) having the same
frequency and maintaining a constant phase difference.
Answer: D
8)A vertically polarized
beam of light of intensity 100 W/m2 passes through two polarizers.
The first polarizer is
making an angle of 20e with its
transmission axis and the second one is making an angle of 40e with its transmission axis. What is the
transmitted intensity of this beam of light?
A) 44.4 W/m2
B) 78.0 W/m2 C)
66.6 W/m2 D) 11.7 W/m2
Answer: B
9) A radio station broadcasts at a frequency of 80 MHz.
How far will this signal travel in 67 ms?
A) 67 m B)
40 x 106 m C) 80 m D) 20 x 106 m
Answer: D
10)A certain astronomical
telescope has a diameter of 5.60 m. What is the maximum (minimum actually)
angle of resolution for this telescope at a wavelength of 620 nm?
A) 1.35 x 10-7
rad B) 1.11 x 10-7 rad C) 2.70 x 10-7 rad D)
3.11 x 10-7 rad
Answer: A
11)A person approaches a
plane mirror at a speed of 6 m/s. How
fast does he approach his
image?
A) 12 m/s B)
10 m/s C) 9 m/s D) 11 m/s
Answer: A
12)What is the focal length
of the corrective contact lens needed by a nearsighted woman whose
far point is 65 cm?
A) +30 cm
B) + 65 cm
C) -30 cm
D) - 65 cm
Answer: D
13) In an electromagnetic wave the E and B
fields are oriented such that
A) they are parallel to one
another and perpendicular to the direction of wave propagation.
B) they are parallel to one
another and parallel to the direction of wave propagation.
C) they are perpendicular
to one another and perpendicular to the direction of wave propagation.
D) they are perpendicular
to one another and parallel to the direction of wave propagation.
Answer: C
14) What best explains the phenomena of the secondary
rainbow of a double rainbow?
A)The colors of the
secondary and primary rainbows are in the same order in the sky, because
light is refracted twice in
both raindrops.
B)The colors of the
secondary and primary rainbows are in the same order in the sky, because
light is reflected twice
inside both raindrops.
C)The colors of the
secondary and primary rainbows are in the same order, because the
secondary rainbow is higher
in the sky.
D)The colors of the
secondary and primary rainbows are in opposite order, because light is
reflected twice inside the
raindrop for the secondary , but only once for the primary.
E) The secondary rainbow
can only occur when it is raining moderately heavy.
Answer: D
15)A car is approaching a
radio station at a speed of 30.0 m/s.
If the radio station broadcasts at a frequency of 74.5 MHz, what change in
frequency does the driver observe?
A) 726 Hz
B) 7.46 Hz
C) 64.5 Hz
D) 98.3 Hz
Answer: B
16) An object 3.0
cm in height is placed at the center of curvature C in front of a
concave mirror. What is the height of its image?
A) 1.5 cm
B) 3.0 cm C) 2.5 cm
D) 2.0 cm
Answer: B
17)A person with normal
eyesight (N = 25 cm) uses a converging lens of focal length 10 cm. He
holds the lens close to his
eye to finish an engraving job. At what distance from the job he must
hold the lens?
A) 7.1 cm B)
20 cm C) 30 cm D) -7.1 cm
Answer: A
18) A sodium light (l = 589.3 nm) is used to view
a soap film to make it look black when directed perpendicular to the film. What
is the minimum thickness of the soap film if the index of refraction of soap
solution is 1.38?
A) 314 nm B)
214 nm C) 114 nm D) 194 nm
Answer: B
19) The energy density of an electromagnetic wave is
A) only in the magnetic
field.
B) only in the electric
field.
C) mostly in the magnetic
field.
D) mostly in the electric
field.
E) none of the other
answers are correct.
Answer: E
20) An object is placed 60
cm from a convex lens of focal length 10 cm. What is the magnification?
A) -0.10
B) 0.10
C) 0.20 D) -0.20
Answer: D