Question 1

The type of electromagnetic radiation that is employed when crystals are used as diffraction gratings is

Accepted Answer

A)  infrared 
B)  Xrays 
C)  visible 
D)  ultraviolet 
E)  microwaves 
A)  infrared 
B)  Xrays 
C)  visible 
D)  ultraviolet 
E)  microwaves

Question 2

You illuminate two slits 0.50 mm apart with light of wavelength 555 nm and observe interference fringes on a screen 6.0 m away. What is the spacing between the fringes on the screen?

Accepted Answer

A)  4.5 mm 
B)  3.3 mm 
C)  6.7 mm 
D)  10 mm 
E)  5.0 mm 
A)  4.5 mm 
B)  3.3 mm 
C)  6.7 mm 
D)  10 mm 
E)  5.0 mm

Question 3

In an experiment to demonstrate interference of light, it is essential that

Accepted Answer

A)  coherent sources of light be used. 
B)  the light paths differ by not more than one-half wavelength. 
C)  the light be monochromatic. 
D)  the beam of light be a parallel beam. 
E)  there be no difference in light paths. 
A)  coherent sources of light be used. 
B)  the light paths differ by not more than one-half wavelength. 
C)  the light be monochromatic. 
D)  the beam of light be a parallel beam. 
E)  there be no difference in light paths.

Question 4

Suppose you observe nineteen bright fringes in the central maximum of a double-slit interference pattern. If you know that the separation of the slits d = 0.06 mm, you can conclude that the width of each slit is

Accepted Answer

A)  0.048 mm 
B)  0.024 mm 
C)  0.003 mm 
D)  0.006 mm 
E)  0.012 mm 
A)  0.048 mm 
B)  0.024 mm 
C)  0.003 mm 
D)  0.006 mm 
E)  0.012 mm

Question 5

Light of wavelength 640 nm is incident perpendicularly from air onto a film 1000 nm thick and of 1.60 refractive index. When part of the light enters the film and is reflected back at the second face, the number of wavelengths contained along the path of this light in the film is

Accepted Answer

A)  1.0 
B)  1.6 
C)  2.0 
D)  3.2 
E)  5.0 
A)  1.0 
B)  1.6 
C)  2.0 
D)  3.2 
E)  5.0

Question 6

The diffraction image of the point object O is indicated in the figure. Of the point objects 1, 2, 3, 4, and 5, the one closest to O whose diffraction image could just be resolved from that of O according to the Rayleigh criterion is

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
E)  5 
A)  1 
B)  2 
C)  3 
D)  4 
E)  5

Question 7

Which of the following statements about Young's double-slit experiment is false?

Accepted Answer

A)  The bands of light are caused by the interference of the light coming from the two slits. 
B)  The results of the double-slit experiment support the particle theory of light. 
C)  Double-slit interference patterns can also be produced with sound and water waves. 
D)  If the slits are moved closer together, the bands of light on the screen are spread farther apart. 
E)  The pattern of light on the screen consists of many bands, not just two bands. 
A)  The bands of light are caused by the interference of the light coming from the two slits. 
B)  The results of the double-slit experiment support the particle theory of light. 
C)  Double-slit interference patterns can also be produced with sound and water waves. 
D)  If the slits are moved closer together, the bands of light on the screen are spread farther apart. 
E)  The pattern of light on the screen consists of many bands, not just two bands.

Question 8

A wedge-shaped film of air is formed by placing two flat glass plates with one end touching each other and the other end spaced by a gold leaf. The wedge is then illuminated using a monochromatic light of wavelength 590 nm from above and the complete fringe pattern is shown. The thickness of the gold leaf is approximately

Accepted Answer

A)  7.1 $\mu$m 
B)  7.4 $\mu$m 
C)  6.5 $\mu$m 
D)  6.8 $\mu$m 
E)  7.8 $\mu$m 
A)  7.1 $\mu$m 
B)  7.4 $\mu$m 
C)  6.5 $\mu$m 
D)  6.8 $\mu$m 
E)  7.8 $\mu$m

Question 9

The spacing between the adjacent lines of a diffraction grating is the same as the distance between the two slits in the Young's double slit experiment. Both are illuminated by light of the same wavelength. In which way do the interference fringes seen on the screen differ for the two methods?

Accepted Answer

A)  There is no difference in the interference fringes. 
B)  The fringes from the grating are farther apart. 
C)  The fringes from the double slit are farther apart. 
D)  Each of the fringes from the grating is narrower than the double slit. 
E)  Each of the fringes from the double slit is narrower than the grating. 
A)  There is no difference in the interference fringes. 
B)  The fringes from the grating are farther apart. 
C)  The fringes from the double slit are farther apart. 
D)  Each of the fringes from the grating is narrower than the double slit. 
E)  Each of the fringes from the double slit is narrower than the grating.

Question 10

If we assume normal incidence, the minimum thickness of a soap film (n = 1.33) in air that gives constructive interference when viewed by reflected light of wavelength
400 nm is

Accepted Answer

A)  225 nm 
B)  200 nm 
C)  100 nm 
D)  75 nm 
E)  57 nm 
A)  225 nm 
B)  200 nm 
C)  100 nm 
D)  75 nm 
E)  57 nm

Question 11

Two waves, one with amplitude A and the second with amplitude 2A, are in phase. The resultant intensity is

Accepted Answer

A)  zero 
B)  A 
C)  3A 
D)  3A2 
E)  (3
A) 2 
A)  zero 
B)  A 
C)  3A 
D)  3A2 
E)  (3
A) 2

Question 12

Which, if any, of the following conditions is not necessary for the light waves from two sources to be coherent?

Accepted Answer

A)  They must have the same frequency. 
B)  They must have the same amplitude. 
C)  They must have the same wavelength. 
D)  They must have a constant phase difference. 
E)  All of these conditions are necessary. 
A)  They must have the same frequency. 
B)  They must have the same amplitude. 
C)  They must have the same wavelength. 
D)  They must have a constant phase difference. 
E)  All of these conditions are necessary.

Question 13

A single-slit diffraction pattern is displayed on a screen 0.900 m away from the slit. If the wavelength of the light is 600 nm and the slit is 1.50 * 10-4 m wide, the distance from the first minimum on the right to the first minimum on the left is

Accepted Answer

A)  0.164 mm 
B)  1.83 mm 
C)  3.99 mm 
D)  7.20 mm 
E)  7.98 mm 
A)  0.164 mm 
B)  1.83 mm 
C)  3.99 mm 
D)  7.20 mm 
E)  7.98 mm

Question 14

For a grating with d = 4.5$\lambda$, the maximum order m of an interference maximum that can be observed for a specified $\lambda$ is

Accepted Answer

A)  4.5 
B)  3 
C)  1 
D)  2 
E)  4 
A)  4.5 
B)  3 
C)  1 
D)  2 
E)  4

Question 15

The 200-in reflecting telescope at Mt. Palomar has an objective mirror with a focal length of 16.8 m. The effective aperture is the diameter of the 200-in mirror
(200 in = 5.08 m). For light in the blue region (450 nm), what is the smallest angle between two stars that this telescope can ideally resolve? (In practice, the limit of resolution is due to atmospheric turbulence.)

Accepted Answer

A)  1.1* 10-8 rad 
B)  1.1 * 10-7 rad 
C)  7.3 * 10-7 rad 
D)  1.1 *10-4 rad 
E)  8.9 * 10-5 rad 
A)  1.1* 10-8 rad 
B)  1.1 * 10-7 rad 
C)  7.3 * 10-7 rad 
D)  1.1 *10-4 rad 
E)  8.9 * 10-5 rad

Question 16

Diffraction occurs when light passes

Accepted Answer

A)  by a small particle. 
B)  through a small hole. 
C)  through a double slit. 
D)  by a sharp edge. 
E)  Diffraction occurs in all of these conditions. 
A)  by a small particle. 
B)  through a small hole. 
C)  through a double slit. 
D)  by a sharp edge. 
E)  Diffraction occurs in all of these conditions.

Question 17

A narrow, horizontal slit is 0.50 mm above a horizontal plane mirror. The slit is illuminated by light of wavelength 400 nm. The interference pattern is viewed on a screen 10.0 m from the slit. What is the vertical distance from the mirror to the first bright line?

Accepted Answer

A)  1.0 mm 
B)  2.0 mm 
C)  3.0 mm 
D)  4.0 mm 
E)  1.2 mm 
A)  1.0 mm 
B)  2.0 mm 
C)  3.0 mm 
D)  4.0 mm 
E)  1.2 mm

Question 18

You set two parallel slits 0.2 mm apart at a distance of 1 m from a screen and illuminate them with light of wavelength 600 nm. The distance between a bright spot in the interference pattern and the dark spot adjacent to it is

Accepted Answer

A)  0.375 mm 
B)  0.750 mm 
C)  1.50 mm 
D)  3.00 mm 
E)  6.00 mm 
A)  0.375 mm 
B)  0.750 mm 
C)  1.50 mm 
D)  3.00 mm 
E)  6.00 mm

Question 19

The distance between the slits in a double-slit experiment is increased by a factor of 4. If the distance between the fringes is about the same as the distance from the slits to the screen, the distance between adjacent fringes

Accepted Answer

A)  increases by a factor of 2. 
B)  increases by a factor of 4. 
C)  decreases by a factor of 2. 
D)  decreases by a factor of 4. 
E)  depends on which two fringes are used for the measurement. 
A)  increases by a factor of 2. 
B)  increases by a factor of 4. 
C)  decreases by a factor of 2. 
D)  decreases by a factor of 4. 
E)  depends on which two fringes are used for the measurement.

Question 20

Two slits separated by 1.0 mm are illuminated with light of a single unknown wavelength. The tenth bright line from the central point of the interference pattern is observed to be at an angle of 0.34º. What is the wavelength of the light?

Accepted Answer

A)  620 nm 
B)  590 nm 
C)  560 nm 
D)  450 nm 
E)  600 nm 
A)  620 nm 
B)  590 nm 
C)  560 nm 
D)  450 nm 
E)  600 nm

The type of electromagnetic radiation that is employed when crystals are used as diffraction gratings is

You illuminate two slits 0.50 mm apart with light of wavelength 555 nm and observe interference fringes on a screen 6.0 m away. What is the spacing between the fringes on the screen?

In an experiment to demonstrate interference of light, it is essential that

Suppose you observe nineteen bright fringes in the central maximum of a double-slit interference pattern. If you know that the separation of the slits d = 0.06 mm, you can conclude that the width of each slit is

Light of wavelength 640 nm is incident perpendicularly from air onto a film 1000 nm thick and of 1.60 refractive index. When part of the light enters the film and is reflected back at the second face, the number of wavelengths contained along the path of this light in the film is

Which of the following statements about Young's double-slit experiment is false?

The spacing between the adjacent lines of a diffraction grating is the same as the distance between the two slits in the Young's double slit experiment. Both are illuminated by light of the same wavelength. In which way do the interference fringes seen on the screen differ for the two methods?

If we assume normal incidence, the minimum thickness of a soap film (n = 1.33) in air that gives constructive interference when viewed by reflected light of wavelength 400 nm is

Two waves, one with amplitude A and the second with amplitude 2A, are in phase. The resultant intensity is

Which, if any, of the following conditions is not necessary for the light waves from two sources to be coherent?

A single-slit diffraction pattern is displayed on a screen 0.900 m away from the slit. If the wavelength of the light is 600 nm and the slit is 1.50 * 10^-4 m wide, the distance from the first minimum on the right to the first minimum on the left is

For a grating with d = 4.5 $\lambda$ , the maximum order m of an interference maximum that can be observed for a specified $\lambda$ is

Diffraction occurs when light passes

A narrow, horizontal slit is 0.50 mm above a horizontal plane mirror. The slit is illuminated by light of wavelength 400 nm. The interference pattern is viewed on a screen 10.0 m from the slit. What is the vertical distance from the mirror to the first bright line?

You set two parallel slits 0.2 mm apart at a distance of 1 m from a screen and illuminate them with light of wavelength 600 nm. The distance between a bright spot in the interference pattern and the dark spot adjacent to it is

The distance between the slits in a double-slit experiment is increased by a factor of 4. If the distance between the fringes is about the same as the distance from the slits to the screen, the distance between adjacent fringes

Two slits separated by 1.0 mm are illuminated with light of a single unknown wavelength. The tenth bright line from the central point of the interference pattern is observed to be at an angle of 0.34º. What is the wavelength of the light?

The Electric Field I: Discrete Charge Distributions

The Electric Field II: Continuous Charge Distributions

Electric Potential

Capacitance

Electric Current and Direct-Current Circuits

The Magnetic Field

Sources of the Magnetic Field

Magnetic Induction

Alternating-Current Circuits

Maxwells Equations and Electromagnetic Waves

Properties of Light

Optical Images

Wave Particle Duality and Quantum Physics

Applications of the Schrodinger Equation

Atoms

Molecules

Solids and the Theory of Conduction

Relativity

Nuclear Physics

Elementary Particles and the Beginning of the Universe

Filters

Exam 13: Interference and Diffraction

The type of electromagnetic radiation that is employed when crystals are used as diffraction gratings is

You illuminate two slits 0.50 mm apart with light of wavelength 555 nm and observe interference fringes on a screen 6.0 m away. What is the spacing between the fringes on the screen?

In an experiment to demonstrate interference of light, it is essential that

Suppose you observe nineteen bright fringes in the central maximum of a double-slit interference pattern. If you know that the separation of the slits d = 0.06 mm, you can conclude that the width of each slit is

Light of wavelength 640 nm is incident perpendicularly from air onto a film 1000 nm thick and of 1.60 refractive index. When part of the light enters the film and is reflected back at the second face, the number of wavelengths contained along the path of this light in the film is

The diffraction image of the point object O is indicated in the figure. Of the point objects 1, 2, 3, 4, and 5, the one closest to O whose diffraction image could just be resolved from that of O according to the Rayleigh criterion is

Which of the following statements about Young's double-slit experiment is false?

The spacing between the adjacent lines of a diffraction grating is the same as the distance between the two slits in the Young's double slit experiment. Both are illuminated by light of the same wavelength. In which way do the interference fringes seen on the screen differ for the two methods?

If we assume normal incidence, the minimum thickness of a soap film (n = 1.33) in air that gives constructive interference when viewed by reflected light of wavelength 400 nm is

Two waves, one with amplitude A and the second with amplitude 2A, are in phase. The resultant intensity is

Which, if any, of the following conditions is not necessary for the light waves from two sources to be coherent?

A single-slit diffraction pattern is displayed on a screen 0.900 m away from the slit. If the wavelength of the light is 600 nm and the slit is 1.50 * 10-4 m wide, the distance from the first minimum on the right to the first minimum on the left is

For a grating with d = 4.5 λ\lambdaλ , the maximum order m of an interference maximum that can be observed for a specified λ\lambdaλ is

Diffraction occurs when light passes

A narrow, horizontal slit is 0.50 mm above a horizontal plane mirror. The slit is illuminated by light of wavelength 400 nm. The interference pattern is viewed on a screen 10.0 m from the slit. What is the vertical distance from the mirror to the first bright line?

You set two parallel slits 0.2 mm apart at a distance of 1 m from a screen and illuminate them with light of wavelength 600 nm. The distance between a bright spot in the interference pattern and the dark spot adjacent to it is

The distance between the slits in a double-slit experiment is increased by a factor of 4. If the distance between the fringes is about the same as the distance from the slits to the screen, the distance between adjacent fringes

Two slits separated by 1.0 mm are illuminated with light of a single unknown wavelength. The tenth bright line from the central point of the interference pattern is observed to be at an angle of 0.34º. What is the wavelength of the light?

The Electric Field I: Discrete Charge Distributions

The Electric Field II: Continuous Charge Distributions

Electric Potential

Capacitance

Electric Current and Direct-Current Circuits

The Magnetic Field

Sources of the Magnetic Field

Magnetic Induction

Alternating-Current Circuits

Maxwells Equations and Electromagnetic Waves

Properties of Light

Optical Images

Wave Particle Duality and Quantum Physics

Applications of the Schrodinger Equation

Atoms

Molecules

Solids and the Theory of Conduction

Relativity

Nuclear Physics

Elementary Particles and the Beginning of the Universe

Filters

A single-slit diffraction pattern is displayed on a screen 0.900 m away from the slit. If the wavelength of the light is 600 nm and the slit is 1.50 * 10^-4 m wide, the distance from the first minimum on the right to the first minimum on the left is

For a grating with d = 4.5 $\lambda$ , the maximum order m of an interference maximum that can be observed for a specified $\lambda$ is