Q36.1
Light of wavelength passes through a single slit of width a.
The diffraction pattern is observed on a screen that is very far
from the slit. Which of the following will give the greatest
increase in the angular width of the central diffraction
maximum?
A. Double the slit width a and double the wavelength
B. Double the slit width a and halve the wavelength
C. Halve the slit width a and double the wavelength
D. Halve the slit width a and halve the wavelength
E. All of the above will give the same increase.
© 2016 Pearson Education, Inc.
A36.1
Light of wavelength passes through a single slit of width a.
The diffraction pattern is observed on a screen that is very far
from the slit. Which of the following will give the greatest
increase in the angular width of the central diffraction
maximum?
A. Double the slit width a and double the wavelength
B. Double the slit width a and halve the wavelength
C. Halve the slit width a and double the wavelength
D. Halve the slit width a and halve the wavelength
E. All of the above will give the same increase.
© 2016 Pearson Education, Inc.
Q36.2
Coherent electromagnetic radiation is sent through a slit of
width 0.0100 mm. For which of the following wavelengths will
there be no points in the diffraction pattern where the intensity
is zero?
A. ultraviolet light of wavelength 50.0 nm
B. blue light of wavelength 500 nm.
C. red light of wavelength 700 nm
D. infrared light of wavelength 10.6 µm
E. more than one of the above
© 2016 Pearson Education, Inc.
A36.2
Coherent electromagnetic radiation is sent through a slit of
width 0.0100 mm. For which of the following wavelengths will
there be no points in the diffraction pattern where the intensity
is zero?
A. ultraviolet light of wavelength 50.0 nm
B. blue light of wavelength 500 nm.
C. red light of wavelength 700 nm
D. infrared light of wavelength 10.6 µm
E. more than one of the above
© 2016 Pearson Education, Inc.
Q36.3
In a single-slit diffraction experiment with waves of
wavelength , there will be no intensity minima (that is, no
dark fringes) if the slit width is small enough. What is the
maximum slit width a for which this occurs?
E. The answer depends on the distance from the slit to
the screen on which the diffraction pattern is viewed.
© 2016 Pearson Education, Inc.
A36.3
In a single-slit diffraction experiment with waves of
wavelength , there will be no intensity minima (that is, no
dark fringes) if the slit width is small enough. What is the
maximum slit width a for which this occurs?
E. The answer depends on the distance from the slit to
the screen on which the diffraction pattern is viewed.
© 2016 Pearson Education, Inc.
Q36.4
In Young’s experiment, coherent light passing through two slits
separated by a distance d produces a pattern of dark and bright
areas on a distant screen. Complete the sentence: “If instead you
use 10 slits, each the same distance d from its neighbor, the
spacing between bright areas will _________ and the width of the
bright areas will _________.”
A. increase, stay the same
B. decrease, stay the same
C. stay the same, increase
D. stay the same, decrease
E. decrease, decrease
© 2016 Pearson Education, Inc.
A36.4
In Young’s experiment, coherent light passing through two slits
separated by a distance d produces a pattern of dark and bright
areas on a distant screen. Complete the sentence: “If instead you
use 10 slits, each the same distance d from its neighbor, the
spacing between bright areas will _________ and the width of the
bright areas will _________.”
A. increase, stay the same
B. decrease, stay the same
C. stay the same, increase
D. stay the same, decrease
E. decrease, decrease
© 2016 Pearson Education, Inc.
Q36.5
Coherent light passes through six (6) slits
separated by a distance d. The light
produces a pattern of dark and bright areas
on a distant screen. To produce a dark area
at a certain position on the screen, what
must be the path difference from adjacent
slits to that position?
D. two of A, B, and C
E. all three of A, B, and C
© 2016 Pearson Education, Inc.
A36.5
Coherent light passes through six (6) slits
separated by a distance d. The light
produces a pattern of dark and bright areas
on a distant screen. To produce a dark area
at a certain position on the screen, what
must be the path difference from adjacent
slits to that position?
D. two of A, B, and C
E. all three of A, B, and C
© 2016 Pearson Education, Inc.
Q36.6
In an x-ray diffraction experiment using a crystal, a pattern of
bright spots is formed on a screen. What causes this?
A. interference of x rays scattered by different atoms in
the crystal
B. interference of x rays emitted by different atoms in
the crystal
C. interference of x rays scattered by different parts of
an individual atom in the crystal
D. interference of x rays emitted by different parts of
an individual atom in the crystal
E. none of the above
© 2016 Pearson Education, Inc.
A36.6
In an x-ray diffraction experiment using a crystal, a pattern of
bright spots is formed on a screen. What causes this?
A. interference of x rays scattered by different atoms in
the crystal
B. interference of x rays emitted by different atoms in
the crystal
C. interference of x rays scattered by different parts of
an individual atom in the crystal
D. interference of x rays emitted by different parts of
an individual atom in the crystal
E. none of the above
© 2016 Pearson Education, Inc.
Q36.7
You use a telescope lens to form an image of two closely
spaced, distant stars. Which of the following will increase the
resolving power?
A. Use a filter so that only the blue light from the stars
enters the lens.
B. Use a filter so that only the red light from the stars
enters the lens.
C. Use a lens of smaller diameter.
D. More than one of A, B, and C will work.
E. None of A, B, or C will work.
© 2016 Pearson Education, Inc.
A36.7
You use a telescope lens to form an image of two closely
spaced, distant stars. Which of the following will increase the
resolving power?
A. Use a filter so that only the blue light from the stars
enters the lens.
B. Use a filter so that only the red light from the stars
enters the lens.
C. Use a lens of smaller diameter.
D. More than one of A, B, and C will work.
E. None of A, B, or C will work.
© 2016 Pearson Education, Inc.
Q-RT36.1
Rank the following single-slit diffraction experiments in order of
the size of the angle from the center of the diffraction pattern to
the first dark fringe, from largest angle to smallest angle.
A. wavelength 400 nm, slit width 0.10 mm
B. wavelength 400 nm, slit width 0.20 mm
C. wavelength 600 nm, slit width 0.20 mm
D. wavelength 600 nm, slit width 0.40 mm
© 2016 Pearson Education, Inc.
A-RT36.1
Rank the following single-slit diffraction experiments in order of
the size of the angle from the center of the diffraction pattern to
the first dark fringe, from largest angle to smallest angle.
A. wavelength 400 nm, slit width 0.10 mm
B. wavelength 400 nm, slit width 0.20 mm
C. wavelength 600 nm, slit width 0.20 mm
D. wavelength 600 nm, slit width 0.40 mm
Answer: ACBD
© 2016 Pearson Education, Inc.
Q-RT36.2
You have been asked to compare four proposals for telescopes to
be placed in orbit above the blurring effects of the earth’s
atmosphere. Rank the proposed telescopes in order of their
ability to resolve small details, from best to worst.
A. a radio telescope 100 m in diameter observing at a
wavelength of 21 cm
B. an infrared telescope 2.0 m in diameter observing at
a wavelength of 10 mm.
C. an optical telescope 2.0 m in diameter observing at a
wavelength of 500 nm
D. an ultraviolet telescope 1.0 m in diameter observing
at a wavelength of 100 nm
© 2016 Pearson Education, Inc.
A-RT36.2
You have been asked to compare four proposals for telescopes to
be placed in orbit above the blurring effects of the earth’s
atmosphere. Rank the proposed telescopes in order of their
ability to resolve small details, from best to worst.
A. a radio telescope 100 m in diameter observing at a
wavelength of 21 cm
B. an infrared telescope 2.0 m in diameter observing at
a wavelength of 10 mm.
C. an optical telescope 2.0 m in diameter observing at a
wavelength of 500 nm
D. an ultraviolet telescope 1.0 m in diameter observing
at a wavelength of 100 nm
Answer: DCBA
© 2016 Pearson Education, Inc.