Question 1

How far away can two point sources of wavelength 500 nm be if they are just resolved in a telescope of aperture 1.5 cm?

Accepted Answer

A)   25 km
B)   12 km
C)   90 m
D)   12 m
E)   more information is neededF) None of the above
G) C) and E)

Question 2

What minimum thickness of oil (n = 1.50)  on the surface of water (n = 1.33)  would give constructive interference for 550 nm light with normal incidence?

Accepted Answer

A)   78.0 nm
B)   80.0 nm
C)   92.0 nm
D)   183 nm
E)   275 nmF) A) and B)
G) A) and C)

Question 3

Two coherent sources emit waves of 2.0-m wavelength in phase.If the path length to an observer differs by ________,then _________ interference occurs.

Accepted Answer

A)   1.0 m,constructive
B)   2.0 m,destructive
C)   3.5 m,constructive
D)   7.0 m,destructive
E)   8.0 m,destructiveF) B) and E)
G) C) and D)

Question 4

Wave 1 has intensity 9.0 units while wave 2 has intensity 4.0 units.What is their ratio of amplitudes,A1/A2?

Accepted Answer

A)   20
B)   5.1
C)   2.3
D)   1.5
E)   1.3F) None of the above
G) C) and D)

Question 5

Two coherent waves reach the same point in phase.One wave has an intensity of 8.00 units and the other has an intensity of 4.00 units.What is the intensity of the superposed wave?

Accepted Answer

A)   4.00 units
B)   8.00 units
C)   12.0 units
D)   23.3 units
E)   24.0 unitsF) A) and D)
G) A) and C)

Question 6

For an angle of one degree,to how many significant figures do sin  θ	hetaθ  and  θ	hetaθ  (in radians)  agree?

Accepted Answer

A)   3
B)   4
C)   5
D)   6
E)   7 F) None of the above
G) A) and B)

Question 7

A single slit of width 0.0300 mm is used to project a diffraction pattern of 500 nm light on a screen at a distance of 2.00 m from the slit.What angle does the central maximum subtend as measured from the slit?

Accepted Answer

A)   1.91 ∘^{\circ}∘ 
B)   3.82 ∘^{\circ}∘ 
C)   0.945 ∘^{\circ}∘ 
D)   1.50 ∘^{\circ}∘ 
E)   3.00 ∘^{\circ}∘F) A) and B)
G) C) and D)

Question 8

Huygen's Principle only applies to

Accepted Answer

A)   electromagnetic waves.
B)   water waves.
C)   sound waves.
D)   all of these choices are correctE) B) and C)
F) B) and D)

Question 9

What is the minimum thickness of a coating of magnesium fluoride (n = 1.38)  applied to glass (n = 1.50)  that gives a minimum reflection for 600 nm light?

Accepted Answer

A)   600 nm
B)   300 nm
C)   435 nm
D)   109 nm
E)   100 nmF) D) and E)
G) A) and B)

Question 10

Holograms appear three dimensional because

Accepted Answer

A)   they are in color.
B)   they are transparent.
C)   they consist of Young double slits.
D)   they recreate wave fronts as if they came from the original source.
E)   of their spectral response to refraction.F) A) and B)
G) A) and E)

Question 11

If the eye can resolve points separated by 2.20  ×	imes×  10-4 rad,when viewed at 12.0 inches,how many dpi is this? (dpi = dots per inch)

Accepted Answer

A)   250
B)   340
C)   380
D)   400
E)   590 F) A) and E)
G) A) and D)

Question 12

Two coherent waves,each with intensity I0,reach the same point in phase.The amplitude of the superposed wave is _________.

Accepted Answer

A)   0
B)   I0
C)   2I0
D)   3I0
E)   4I0F) A) and B)
G) None of the above

Question 13

If the two slits in a two-slit apparatus kept the same width,but the distance between the two slits is increased,the number of interference fringes within the diffraction maximum will:

Accepted Answer

A)   decrease
B)   increase
C)   may do any of the above.
D)   remain the sameE) C) and D)
F) None of the above

Question 14

What is the minimum thickness of the air layer between two flat glass surfaces if the glass is to appear bright when 450 nm light is incident normally?

Accepted Answer

A)   57.0 nm
B)   113 nm
C)   170 nm
D)   226 nmE) A) and D)
F) All of the above

Question 15

Max von Laue is known for his work with

Accepted Answer

A)   double-slit interference.
B)   single-slit diffraction.
C)   x-ray crystallography.
D)   holography.
E)   magnetic resonance imaging.F) B) and C)
G) None of the above

Question 16

X-rays of wavelength 0.080 nm are used in a Bragg scattering experiment with a crystal.If the first order maximum is found at a grazing angle of 6.0 ∘^{\circ}∘ ,what is the plane spacing in the crystal?

Accepted Answer

A)   0.31 nm
B)   0.71 nm
C)   1.4 nm
D)   0.38 nm
E)   0.77 nm F) A) and D)
G) All of the above

Question 17

Light of wavelength 450 nm produces a first-order maximum at 27 ∘^{\circ}∘ when viewed through a grating.At what angle would a first order maximum occur for a wavelength of 600 nm viewed through this grating?

Accepted Answer

A)   54 ∘^{\circ}∘ 
B)   40 ∘^{\circ}∘ 
C)   36 ∘^{\circ}∘ 
D)   37 ∘^{\circ}∘ 
E)   14 ∘^{\circ}∘F) None of the above
G) A) and B)

Question 18

Using a double-slit with a d = 300 nm and light of a wavelength of 400 nm,what would you see on a distant screen?

Accepted Answer

A)   the intensity is maximum at the center and gradually decreases to either side
B)   the intensity is minimal at the center and gradually increases to either side
C)   the intensity is maximum in a single narrow line at the center
D)   the intensity is minimal in a single narrow line at the centerE) B) and C)
F) None of the above

Question 19

A double-slit experiment is performed and then redone using slits of double the previous separation.Nothing else is changed.If the approximation sin  θ	hetaθ   ≈\approx≈   θ	hetaθ   holds,what happens to the angle between the maxima?

Accepted Answer

A)   it stays the same
B)   it doubles
C)   it quadruples
D)   it halves
E)   it quarters F) B) and E)
G) None of the above

Question 20

A two-slit apparatus is covered with a red (660 nm)  filter.When white light is shone on the filter,on the screen beyond the two-slit apparatus,there are 9 interference minima within the 4.5 cm-wide central diffraction maximum.When a blue (440 nm)  filter replaces the red,how many fringes will there be in the central diffraction maximum?

Accepted Answer

A)   3
B)   13
C)   9
D)   6E) All of the above
F) B) and C)

Exam 25: Interference and Diffraction

A single slit of width 0.0300 mm is used to project a diffraction pattern of 500 nm light on a screen at a distance of 2.00 m from the slit.What angle does the central maximum subtend as measured from the slit?

Correct Answer
verified

Two coherent sources emit waves of 2.0-m wavelength in phase.If the path length to an observer differs by ,then _ interference occurs.

Correct Answer
verified

X-rays of wavelength 0.080 nm are used in a Bragg scattering experiment with a crystal.If the first order maximum is found at a grazing angle of 6.0 $^{\circ}$ ,what is the plane spacing in the crystal?

Correct Answer
verified

Max von Laue is known for his work with

Correct Answer
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Correct Answer
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What is the minimum thickness of a coating of magnesium fluoride (n = 1.38) applied to glass (n = 1.50) that gives a minimum reflection for 600 nm light?

Correct Answer
verified

A double-slit experiment is performed and then redone using slits of double the previous separation.Nothing else is changed.If the approximation sin $\theta$ $\approx$ $\theta$ holds,what happens to the angle between the maxima?

Correct Answer
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Huygen's Principle only applies to

Correct Answer
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Two coherent waves,each with intensity I₀,reach the same point in phase.The amplitude of the superposed wave is _________.

Correct Answer
verified

Two coherent waves reach the same point in phase.One wave has an intensity of 8.00 units and the other has an intensity of 4.00 units.What is the intensity of the superposed wave?

Correct Answer
verified

Holograms appear three dimensional because

Correct Answer
verified

What is the minimum thickness of the air layer between two flat glass surfaces if the glass is to appear bright when 450 nm light is incident normally?

Correct Answer
verified

Wave 1 has intensity 9.0 units while wave 2 has intensity 4.0 units.What is their ratio of amplitudes,A₁/A₂?

Correct Answer
verified

What minimum thickness of oil (n = 1.50) on the surface of water (n = 1.33) would give constructive interference for 550 nm light with normal incidence?

Correct Answer
verified

Light of wavelength 450 nm produces a first-order maximum at 27 $^{\circ}$ when viewed through a grating.At what angle would a first order maximum occur for a wavelength of 600 nm viewed through this grating?

Correct Answer
verified

If the eye can resolve points separated by 2.20 $\times$ 10^-4 rad,when viewed at 12.0 inches,how many dpi is this? (dpi = dots per inch)

Correct Answer
verified

Using a double-slit with a d = 300 nm and light of a wavelength of 400 nm,what would you see on a distant screen?

Correct Answer
verified

For an angle of one degree,to how many significant figures do sin $\theta$ and $\theta$ (in radians) agree?

Correct Answer
verified

How far away can two point sources of wavelength 500 nm be if they are just resolved in a telescope of aperture 1.5 cm?

Correct Answer
verified

If the two slits in a two-slit apparatus kept the same width,but the distance between the two slits is increased,the number of interference fringes within the diffraction maximum will:

Correct Answer
verified

Exam 25: Interference and Diffraction

A single slit of width 0.0300 mm is used to project a diffraction pattern of 500 nm light on a screen at a distance of 2.00 m from the slit.What angle does the central maximum subtend as measured from the slit?

Correct AnswerverifiedShow Answer

Two coherent sources emit waves of 2.0-m wavelength in phase.If the path length to an observer differs by ________,then _________ interference occurs.

Correct AnswerverifiedShow Answer

X-rays of wavelength 0.080 nm are used in a Bragg scattering experiment with a crystal.If the first order maximum is found at a grazing angle of 6.0 ∘^{\circ}∘ ,what is the plane spacing in the crystal?

Correct AnswerverifiedShow Answer

Max von Laue is known for his work with

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

What is the minimum thickness of a coating of magnesium fluoride (n = 1.38) applied to glass (n = 1.50) that gives a minimum reflection for 600 nm light?

Correct AnswerverifiedShow Answer

A double-slit experiment is performed and then redone using slits of double the previous separation.Nothing else is changed.If the approximation sin θ\thetaθ ≈\approx≈ θ\thetaθ holds,what happens to the angle between the maxima?

Correct AnswerverifiedShow Answer

Huygen's Principle only applies to

Correct AnswerverifiedShow Answer

Two coherent waves,each with intensity I0,reach the same point in phase.The amplitude of the superposed wave is _________.

Correct AnswerverifiedShow Answer

Two coherent waves reach the same point in phase.One wave has an intensity of 8.00 units and the other has an intensity of 4.00 units.What is the intensity of the superposed wave?

Correct AnswerverifiedShow Answer

Holograms appear three dimensional because

Correct AnswerverifiedShow Answer

What is the minimum thickness of the air layer between two flat glass surfaces if the glass is to appear bright when 450 nm light is incident normally?

Correct AnswerverifiedShow Answer

Wave 1 has intensity 9.0 units while wave 2 has intensity 4.0 units.What is their ratio of amplitudes,A1/A2?

Correct AnswerverifiedShow Answer

What minimum thickness of oil (n = 1.50) on the surface of water (n = 1.33) would give constructive interference for 550 nm light with normal incidence?

Correct AnswerverifiedShow Answer

Light of wavelength 450 nm produces a first-order maximum at 27 ∘^{\circ}∘ when viewed through a grating.At what angle would a first order maximum occur for a wavelength of 600 nm viewed through this grating?

Correct AnswerverifiedShow Answer

If the eye can resolve points separated by 2.20 ×\times× 10-4 rad,when viewed at 12.0 inches,how many dpi is this? (dpi = dots per inch)

Correct AnswerverifiedShow Answer

Using a double-slit with a d = 300 nm and light of a wavelength of 400 nm,what would you see on a distant screen?

Correct AnswerverifiedShow Answer

For an angle of one degree,to how many significant figures do sin θ\thetaθ and θ\thetaθ (in radians) agree?

Correct AnswerverifiedShow Answer

How far away can two point sources of wavelength 500 nm be if they are just resolved in a telescope of aperture 1.5 cm?

Correct AnswerverifiedShow Answer

If the two slits in a two-slit apparatus kept the same width,but the distance between the two slits is increased,the number of interference fringes within the diffraction maximum will:

Correct AnswerverifiedShow Answer

Correct Answer
verified

Two coherent sources emit waves of 2.0-m wavelength in phase.If the path length to an observer differs by ,then _ interference occurs.

Correct Answer
verified

X-rays of wavelength 0.080 nm are used in a Bragg scattering experiment with a crystal.If the first order maximum is found at a grazing angle of 6.0 $^{\circ}$ ,what is the plane spacing in the crystal?

Correct Answer
verified

Correct Answer
verified

Correct Answer
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Correct Answer
verified

A double-slit experiment is performed and then redone using slits of double the previous separation.Nothing else is changed.If the approximation sin $\theta$ $\approx$ $\theta$ holds,what happens to the angle between the maxima?

Correct Answer
verified

Correct Answer
verified

Two coherent waves,each with intensity I₀,reach the same point in phase.The amplitude of the superposed wave is _________.

Correct Answer
verified

Correct Answer
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Correct Answer
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Correct Answer
verified

Wave 1 has intensity 9.0 units while wave 2 has intensity 4.0 units.What is their ratio of amplitudes,A₁/A₂?

Correct Answer
verified

Correct Answer
verified

Light of wavelength 450 nm produces a first-order maximum at 27 $^{\circ}$ when viewed through a grating.At what angle would a first order maximum occur for a wavelength of 600 nm viewed through this grating?

Correct Answer
verified

If the eye can resolve points separated by 2.20 $\times$ 10^-4 rad,when viewed at 12.0 inches,how many dpi is this? (dpi = dots per inch)

Correct Answer
verified

Correct Answer
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For an angle of one degree,to how many significant figures do sin $\theta$ and $\theta$ (in radians) agree?

Correct Answer
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Correct Answer
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Correct Answer
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