Question 1

λ\lambdaλ (nm) 
N
350
1) 725
400
1) 600
500
1) 525
600
1) 500
700
1) 495
You obtain the data in the table for a certain prism in a spectrometer experiment and determine that the light of an unknown wavelength has an index of refraction of 1.562. From a dispersion curve you find the wavelength to be

Accepted Answer

A)   375 nm
B)   430 nm
C)   450 nm
D)   480 nm
E)   550 nm F) A) and C)
G) B) and E)

Question 2

As the width of the slit producing a single-slit diffraction pattern is slowly and steadily reduced (always remaining larger than the wavelength of the light) , the diffraction pattern

Accepted Answer

A)   slowly and steadily gets wider.
B)   slowly and steadily gets brighter.
C)   does not change because the wavelength of the light does not change.
D)   slowly and steadily gets narrower.
E)   None of these is correct.F) B) and E)
G) A) and D)

Question 3

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 400 nm. The distance between the first and second dark lines of the interference pattern on the screen is

Accepted Answer

A)   2.5 mm
B)   2.0 mm
C)   1.5 mm
D)   1.0 mm
E)   0.5 mmF) C) and D)
G) A) and B)

Question 4

Two parallel glass plates of index of refraction n are separated by an air film of thickness d. Light of wavelength  λ\lambdaλ  in air, normally incident on the plates, is intensified on reflection when, for some integer m

Accepted Answer

A)   2d = m λ\lambdaλ 
B)   2d = m λ\lambdaλ 0/n
C)   2d = mn λ\lambdaλ 
D)   2d = (m + 1/2)  λ\lambdaλ 
E)   2nd = m λ\lambdaλ  /2 F) A) and D)
G) A) and E)

Question 5

A monochromatic beam of light of wavelength 600 nm falls on a grating at normal incidence and produces a second-order image at an angle of 30º. The grating spacing must be

Accepted Answer

A)   0.60 µm
B)   2.4 µm
C)   0.30 µm
D)   1.4 µm
E)   1.0 µmF) A) and D)
G) C) and D)

Question 6

If the prism spectrum of a source is a line spectrum, the grating spectrum would

Accepted Answer

A)   have lines identical in intensity and position.
B)   have lines identical in position but not in intensity.
C)   be an absorption spectrum.
D)   also be a line spectrum.
E)   be a continuous spectrum.F) A) and B)
G) C) and E)

Question 7

You create a wedge-shaped film of air between two flat plates of glass 2.5 cm wide by laying one on top of the other and placing a small slip of paper 1.0 mm thick between their edges at one end. You illuminate the glass plates with normally incident monochromatic light of unknown wavelength. Observing the reflection, you see dark fringes at both ends of the plates. Between the ends you see three other dark fringes. What is the wavelength of the incident light?

Accepted Answer

A)   250 nm
B)   400 nm
C)   440 nm
D)   500 nm
E)   620 nmF) C) and D)
G) A) and E)

Question 8

For a grating with d = 3.5 λ\lambdaλ , the maximum order m of an interference maximum that can be observed for a specified  λ\lambdaλ  is

Accepted Answer

A)   3.5
B)   3
C)   1
D)   2
E)   2.5 F) A) and B)
G) A) and D)

Question 9

The bending of light around an obstacle such as the edge of a slit is called

Accepted Answer

A)   diffraction
B)   dispersion
C)   reflection
D)   refraction
E)   polarizationF) C) and D)
G) A) and C)

Question 10

Two side-by-side coherent light sources radiate at 480 nm. At a point in space where the path difference to these two sources is 50 nm, the phase difference could be

Accepted Answer

A)   0.238 radians
B)   0.375 radians
C)   0.466 radians
D)   0.582 radians
E)   0.654 radiansF) A) and E)
G) C) and D)

Question 11

White light is in one case dispersed by refraction on passing through a glass prism and in a second case diffracted by means of a grating. When the red component and the blue component are considered, it is found that

Accepted Answer

A)   red is both refracted and diffracted at greater angles than blue.
B)   blue is both refracted and diffracted at greater angles than red.
C)   red is refracted at a greater angle than blue, but blue is diffracted at a greater angle than red.
D)   blue is refracted at a greater angle than red, but red is diffracted at a greater angle than blue.
E)   both red and blue are refracted at the same angle and diffracted at the same angle.F) C) and E)
G) A) and C)

Question 12

A diffraction grating has 5000 lines per centimeter and is 1.5 centimeters wide. When radiation is incident upon the grating a second-order maximum is observed at an angle of 37º. The wavelength of this light is

Accepted Answer

A)   400 nm
B)   600 nm
C)   900 nm
D)   1200 nm
E)   2400 nmF) B) and D)
G) A) and B)

Question 13

In a double-slit experiment, the distance from the slits to the screen is decreased by a factor of 2. If the distance between the fringes is small compared with 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)   depends on the width of the slits.
D)   decreases by a factor of 2.
E)   decreases by a factor of 4.F) B) and E)
G) A) and E)

Question 14

The fringes are the result of

Accepted Answer

A)   diffraction from a single slit.
B)   interference from a double slit in addition to diffraction from the two slits.
C)   interference from three slits.
D)   diffraction from three slits.
E)   None of these is correct.F) A) and E)
G) C) and D)

Question 15

Visible light from an ordinary source such as a sodium lamp can be used to produce interference effects that demonstrate the wave nature of light, provided that

Accepted Answer

A)   the light beam from the single source is split into two (or more)  beams that have a constant phase relationship to one another.
B)   the light is polarized.
C)   the light is not polarized.
D)   Interference effects cannot be demonstrated with ordinary light sources.
E)   None of these conditions are satisfied.F) C) and E)
G) B) and D)

Question 16

The path difference for the two waves shown in the figure could be

Accepted Answer

A)   ¾ λ\lambdaλ 
B)   ½ λ\lambdaλ 
C)   ¼ λ\lambdaλ 
D)   λ\lambdaλ 
E)   It is not possible to answer this question without additional information. F) A) and B)
G) A) and E)

Question 17

The minimum path difference that will produce a phase difference of 90º for light of wavelength 500 nm is

Accepted Answer

A)   62.5 nm
B)   125 nm
C)   250 nm
D)   375 nm
E)   400 nmF) A) and B)
G) D) and E)

Question 18

For a given light source and collimator slit width, the spectral lines obtained using a prism are brighter than those using a diffraction grating because

Accepted Answer

A)   the grating absorbs more light than the prism.
B)   light is dispersed more by a prism than by a grating.
C)   the prism forms a single spectrum and the grating forms multiple spectra.
D)   light passes through the prism at minimum deviation.
E)   light is dispersed more by a grating than by a prism.F) A) and B)
G) A) and C)

Question 19

Green light of wavelength 500 nm is incident normally on a diffraction grating that has 5300 lines/cm. The second-order image is diffracted at an angle from the normal of

Accepted Answer

A)   10º
B)   16º
C)   32º
D)   48º
E)   57ºF) D) and E)
G) C) and D)

Question 20

Two waves, one with amplitude A and the second with amplitude 2A, are out of phase by 180  °\degree° . The resultant intensity is

Accepted Answer

A)   zero
B)   A
C)   A2
D)   2A2
E)   (3
A)  2 F) B) and E)
G) B) and C)

Exam 13: Interference and Diffraction

The minimum path difference that will produce a phase difference of 90º for light of wavelength 500 nm is

Correct Answer
verified

The bending of light around an obstacle such as the edge of a slit is called

Correct Answer
verified

White light is in one case dispersed by refraction on passing through a glass prism and in a second case diffracted by means of a grating. When the red component and the blue component are considered, it is found that

Correct Answer
verified

Two side-by-side coherent light sources radiate at 480 nm. At a point in space where the path difference to these two sources is 50 nm, the phase difference could be

Correct Answer
verified

In a double-slit experiment, the distance from the slits to the screen is decreased by a factor of 2. If the distance between the fringes is small compared with the distance from the slits to the screen, the distance between adjacent fringes

Correct Answer
verified

A diffraction grating has 5000 lines per centimeter and is 1.5 centimeters wide. When radiation is incident upon the grating a second-order maximum is observed at an angle of 37º. The wavelength of this light is

Correct Answer
verified

For a grating with d = 3.5 $\lambda$ , the maximum order m of an interference maximum that can be observed for a specified $\lambda$ is

Correct Answer
verified

Visible light from an ordinary source such as a sodium lamp can be used to produce interference effects that demonstrate the wave nature of light, provided that

Correct Answer
verified

$\lambda$ (nm) N 350 1) 725 400 1) 600 500 1) 525 600 1) 500 700 1) 495 You obtain the data in the table for a certain prism in a spectrometer experiment and determine that the light of an unknown wavelength has an index of refraction of 1.562. From a dispersion curve you find the wavelength to be

Correct Answer
verified

If the prism spectrum of a source is a line spectrum, the grating spectrum would

Correct Answer
verified

Correct Answer
verified

$The fringes are the result of A) diffraction from a single slit. B) interference from a double slit in addition to diffraction from the two slits. C) interference from three slits. D) diffraction from three slits. E) None of these is correct.$ The fringes are the result of

Correct Answer
verified

$The path difference for the two waves shown in the figure could be A) ¾ \lambda B) ½ \lambda C) ¼ \lambda D) \lambda E) It is not possible to answer this question without additional information.$ The path difference for the two waves shown in the figure could be

Correct Answer
verified

Correct Answer
verified

Green light of wavelength 500 nm is incident normally on a diffraction grating that has 5300 lines/cm. The second-order image is diffracted at an angle from the normal of

Correct Answer
verified

A monochromatic beam of light of wavelength 600 nm falls on a grating at normal incidence and produces a second-order image at an angle of 30º. The grating spacing must be

Correct Answer
verified

Two waves, one with amplitude A and the second with amplitude 2A, are out of phase by 180 $\degree$ . The resultant intensity is

Correct Answer
verified

As the width of the slit producing a single-slit diffraction pattern is slowly and steadily reduced (always remaining larger than the wavelength of the light) , the diffraction pattern

Correct Answer
verified

For a given light source and collimator slit width, the spectral lines obtained using a prism are brighter than those using a diffraction grating because

Correct Answer
verified

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 400 nm. The distance between the first and second dark lines of the interference pattern on the screen is

Correct Answer
verified

Exam 13: Interference and Diffraction

The minimum path difference that will produce a phase difference of 90º for light of wavelength 500 nm is

Correct AnswerverifiedShow Answer

The bending of light around an obstacle such as the edge of a slit is called

Correct AnswerverifiedShow Answer

White light is in one case dispersed by refraction on passing through a glass prism and in a second case diffracted by means of a grating. When the red component and the blue component are considered, it is found that

Correct AnswerverifiedShow Answer

Two side-by-side coherent light sources radiate at 480 nm. At a point in space where the path difference to these two sources is 50 nm, the phase difference could be

Correct AnswerverifiedShow Answer

In a double-slit experiment, the distance from the slits to the screen is decreased by a factor of 2. If the distance between the fringes is small compared with the distance from the slits to the screen, the distance between adjacent fringes

Correct AnswerverifiedShow Answer

A diffraction grating has 5000 lines per centimeter and is 1.5 centimeters wide. When radiation is incident upon the grating a second-order maximum is observed at an angle of 37º. The wavelength of this light is

Correct AnswerverifiedShow Answer

For a grating with d = 3.5 λ\lambdaλ , the maximum order m of an interference maximum that can be observed for a specified λ\lambdaλ is

Correct AnswerverifiedShow Answer

Visible light from an ordinary source such as a sodium lamp can be used to produce interference effects that demonstrate the wave nature of light, provided that

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

If the prism spectrum of a source is a line spectrum, the grating spectrum would

Correct AnswerverifiedShow Answer

Two parallel glass plates of index of refraction n are separated by an air film of thickness d. Light of wavelength λ\lambdaλ in air, normally incident on the plates, is intensified on reflection when, for some integer m

Correct AnswerverifiedShow Answer

The fringes are the result of

Correct AnswerverifiedShow Answer

The path difference for the two waves shown in the figure could be

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Green light of wavelength 500 nm is incident normally on a diffraction grating that has 5300 lines/cm. The second-order image is diffracted at an angle from the normal of

Correct AnswerverifiedShow Answer

A monochromatic beam of light of wavelength 600 nm falls on a grating at normal incidence and produces a second-order image at an angle of 30º. The grating spacing must be

Correct AnswerverifiedShow Answer

Two waves, one with amplitude A and the second with amplitude 2A, are out of phase by 180 °\degree° . The resultant intensity is

Correct AnswerverifiedShow Answer

As the width of the slit producing a single-slit diffraction pattern is slowly and steadily reduced (always remaining larger than the wavelength of the light) , the diffraction pattern

Correct AnswerverifiedShow Answer

For a given light source and collimator slit width, the spectral lines obtained using a prism are brighter than those using a diffraction grating because

Correct AnswerverifiedShow Answer

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 400 nm. The distance between the first and second dark lines of the interference pattern on the screen is

Correct AnswerverifiedShow Answer

Correct Answer
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verified

For a grating with d = 3.5 $\lambda$ , the maximum order m of an interference maximum that can be observed for a specified $\lambda$ is

Correct Answer
verified

Correct Answer
verified

Correct Answer
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Correct Answer
verified

Correct Answer
verified

$The fringes are the result of A) diffraction from a single slit. B) interference from a double slit in addition to diffraction from the two slits. C) interference from three slits. D) diffraction from three slits. E) None of these is correct.$ The fringes are the result of

Correct Answer
verified

$The path difference for the two waves shown in the figure could be A) ¾ \lambda B) ½ \lambda C) ¼ \lambda D) \lambda E) It is not possible to answer this question without additional information.$ The path difference for the two waves shown in the figure could be

Correct Answer
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Two waves, one with amplitude A and the second with amplitude 2A, are out of phase by 180 $\degree$ . The resultant intensity is

Correct Answer
verified

Correct Answer
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Correct Answer
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Correct Answer
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