Question 1

Two flat glass plates are in contact along one end and are separated by a sheet of paper 4.0 x 10-6 m thick at the other end.The top plate is illuminated by a monochromatic light source of wavelength 490 nm.How many dark parallel bands will be evident across the top plate? (1 nm = 10-9 m)

Accepted Answer

A)  7
B)  9
C)  13
D)  17

Question 2

In order to produce a sustained interference pattern by light waves from multiple sources,which of the following conditions must be met?

Accepted Answer

A)  Sources are coherent.
B)  Sources are monochromatic.
C)  Both choices above are valid.
D)  None of the choices above are valid.

Question 3

When the sun is located near one of the horizons,an observer looking at the sky directly overhead will view partially polarized light.This effect is due to which of the following processes?

Accepted Answer

A)  reflection
B)  double refraction
C)  selective absorption
D)  scattering

Question 4

Waves from a radio station with a wavelength of 600 m arrive at a home receiver a distance 50 km away from the transmitter by two paths.One is a direct-line path and the second by reflection from a mountain directly behind the receiver.What is the minimum distance between the mountain and receiver such that destructive interference occurs at the location of the listener? Assume no phase change on reflection.

Accepted Answer

A)  150 m
B)  300 m
C)  450 m
D)  600 m

Question 5

A silicon monoxide (n = 1.45) film of 100 nm thickness is used to coat a glass camera lens (n = 1.56) .What wavelength of light in the visible region (390 to 710 nm) will be most efficiently transmitted by this system? (1 nm = 10-9 m)

Accepted Answer

A)  400 nm
B)  492 nm
C)  624 nm
D)  580 nm

Question 6

At what angle will the second order maximum occur for a wavelength of 400 nm using a diffraction grating with 10 000 lines per cm?

Accepted Answer

A)  15.5  °\degree° 
B)  24  °\degree° 
C)  53  °\degree° 
D)  No second order maximum will occur in this case.

Question 7

Upon reflection,light undergoes a 180  °\degree°  phase change:

Accepted Answer

A)  always.
B)  if the incident medium has the higher index of refraction.
C)  if the incident medium has the lower index of refraction.
D)  whenever the incident angle is less than the critical angle.

Question 8

A diffraction grating has 4000 lines/cm.What is the slit separation?

Accepted Answer

A)  4.0 ìm
B)  2.5 ìm
C)  400 nm
D)  250 nm

Question 9

A surface is coated with a material having index of refraction 1.50.If light in air has a wavelength of 450 nm and is normally incident on this surface,and it is found through interference effects with this light that the surface is 10 wavelengths thick,which of the following is the thickness of the surface?

Accepted Answer

A)  1.5 ìm
B)  3.0 ìm
C)  4.5 ìm
D)  6.8 ìm

Question 10

Plane polarized light is sent through two consecutive polarizers,the first having its plane of polarization in the same direction as the incident light and the second having its plane at 90  °\degree°  to the original plane of polarization.A third polarizer,with plane of polarization at 30  °\degree° to the original plane of polarization,is placed between the two other polarizers.What fraction of the original intensity now gets through?

Accepted Answer

A)  0
B)  0.56
C)  0.25
D)  0.19

Question 11

A light source simultaneously emits light of two wavelengths,480 nm and 560 nm,respectively.The source is used in a double-slit interference experiment where the slit spacing is a 0.040 mm,and the distance between double slits and the screen is 1.2 m.What is the separation between the second-order bright fringes of the two wavelengths as they appear on the screen? (1 nm = 10-9 m)

Accepted Answer

A)  0.16 cm
B)  0.32 cm
C)  0.48 cm
D)  0.64 cm

Question 12

In a Young's double-slit experiment,what happens to the angular separation between the fringes when the wavelength is increased at the same time that the slit separation is decreased?

Accepted Answer

A)  It increases.
B)  It decreases.
C)  It stays the same.
D)  The relative sizes of the changes need to be known before a definite answer can be given.

Question 13

The intensity of unpolarized light passing through a single sheet of polarizing material changes by a factor of:

Accepted Answer

A)  1.
B)  0.5.
C)  cos q.
D)  cos2 q.

Question 14

Two closely spaced parallel glass plates are separated by 750 nm.What wavelength light source in the visible region (390 nm to 710 nm) will experience maximum transmission through the two plates?

Accepted Answer

A)  500 nm
B)  429 nm
C)  600 nm
D)  684 nm

Question 15

Light travels from outside a building to inside through a pane of glass.Which of the following is true regarding the phase change upon reflection in the case?

Accepted Answer

A)  No phase change occurs at either the inside surface or the outside surface of the glass.
B)  A 180o phase change occurs at both the inside surface and the outside surface.
C)  A 180o phase change occurs at the inside surface but not at the outside surface.
D)  A 180o phase change occurs at the outside surface but not at the inside surface.

Question 16

The critical angle for sapphire surrounded by air is 34.4  °\degree° .Calculate the polarizing angle for sapphire.

Accepted Answer

A)  60.5  °\degree° 
B)  59.7  °\degree° 
C)  58.6  °\degree° 
D)  56.3  °\degree°

Question 17

In a Young's experiment,the paths from the slits to a point on the screen differ in length,causing destructive interference at the point.Which of the following path difference would cause this destructive interference?

Accepted Answer

A)  5ë/2
B)  3ë/4
C)  4ë
D)  None of the above.

Question 18

A Young's double-slit apparatus is set up.A screen is positioned 1.60 m from the double slits,and the spacing between the two slits is 0.040 0 mm.The distance between alternating bright fringes is 1.42 cm.What is the light source wavelength? (1 nm = 10-9 m)

Accepted Answer

A)  710 nm
B)  490 nm
C)  280 nm
D)  355 nm

Question 19

A hair is placed at one edge between two flat glass plates.When this arrangement is illuminated with yellow light of wavelength (l = 600 nm) ,a total of 121 dark bands are counted starting at the point of contact between the plates.How thick is the hair? (1 nm = 10-9 m)

Accepted Answer

A)  3.6 x 10-5 m
B)  1.8 x 10-5 m
C)  3.6 x 10-4 m
D)  1.8 x 10-4 m

Question 20

In a Young's double-slit experiment,how many maxima occur between the 4th order maxima?

Accepted Answer

A)  6
B)  7
C)  8
D)  Three more than the number of minima.

Exam 24: Wave Optics

Correct Answer
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In a Young's double-slit experiment,what happens to the angular separation between the fringes when the wavelength is increased at the same time that the slit separation is decreased?

Correct Answer
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Correct Answer
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A Young's double-slit apparatus is set up.A screen is positioned 1.60 m from the double slits,and the spacing between the two slits is 0.040 0 mm.The distance between alternating bright fringes is 1.42 cm.What is the light source wavelength? (1 nm = 10^-9 m)

Correct Answer
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In a Young's double-slit experiment,how many maxima occur between the 4^th order maxima?

Correct Answer
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At what angle will the second order maximum occur for a wavelength of 400 nm using a diffraction grating with 10 000 lines per cm?

Correct Answer
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A silicon monoxide (n = 1.45) film of 100 nm thickness is used to coat a glass camera lens (n = 1.56) .What wavelength of light in the visible region (390 to 710 nm) will be most efficiently transmitted by this system? (1 nm = 10^-9 m)

Correct Answer
verified

The critical angle for sapphire surrounded by air is 34.4 $\degree$ .Calculate the polarizing angle for sapphire.

Correct Answer
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A hair is placed at one edge between two flat glass plates.When this arrangement is illuminated with yellow light of wavelength (l = 600 nm) ,a total of 121 dark bands are counted starting at the point of contact between the plates.How thick is the hair? (1 nm = 10^-9 m)

Correct Answer
verified

When the sun is located near one of the horizons,an observer looking at the sky directly overhead will view partially polarized light.This effect is due to which of the following processes?

Correct Answer
verified

In order to produce a sustained interference pattern by light waves from multiple sources,which of the following conditions must be met?

Correct Answer
verified

A diffraction grating has 4000 lines/cm.What is the slit separation?

Correct Answer
verified

Two closely spaced parallel glass plates are separated by 750 nm.What wavelength light source in the visible region (390 nm to 710 nm) will experience maximum transmission through the two plates?

Correct Answer
verified

The intensity of unpolarized light passing through a single sheet of polarizing material changes by a factor of:

Correct Answer
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In a Young's experiment,the paths from the slits to a point on the screen differ in length,causing destructive interference at the point.Which of the following path difference would cause this destructive interference?

Correct Answer
verified

Upon reflection,light undergoes a 180 $\degree$ phase change:

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Light travels from outside a building to inside through a pane of glass.Which of the following is true regarding the phase change upon reflection in the case?

Correct Answer
verified

Two flat glass plates are in contact along one end and are separated by a sheet of paper 4.0 x 10^-6 m thick at the other end.The top plate is illuminated by a monochromatic light source of wavelength 490 nm.How many dark parallel bands will be evident across the top plate? (1 nm = 10^-9 m)

Correct Answer
verified

Exam 24: Wave Optics

Correct AnswerverifiedShow Answer

In a Young's double-slit experiment,what happens to the angular separation between the fringes when the wavelength is increased at the same time that the slit separation is decreased?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

A Young's double-slit apparatus is set up.A screen is positioned 1.60 m from the double slits,and the spacing between the two slits is 0.040 0 mm.The distance between alternating bright fringes is 1.42 cm.What is the light source wavelength? (1 nm = 10-9 m)

Correct AnswerverifiedShow Answer

In a Young's double-slit experiment,how many maxima occur between the 4th order maxima?

Correct AnswerverifiedShow Answer

At what angle will the second order maximum occur for a wavelength of 400 nm using a diffraction grating with 10 000 lines per cm?

Correct AnswerverifiedShow Answer

A silicon monoxide (n = 1.45) film of 100 nm thickness is used to coat a glass camera lens (n = 1.56) .What wavelength of light in the visible region (390 to 710 nm) will be most efficiently transmitted by this system? (1 nm = 10-9 m)

Correct AnswerverifiedShow Answer

The critical angle for sapphire surrounded by air is 34.4 °\degree° .Calculate the polarizing angle for sapphire.

Correct AnswerverifiedShow Answer

A hair is placed at one edge between two flat glass plates.When this arrangement is illuminated with yellow light of wavelength (l = 600 nm) ,a total of 121 dark bands are counted starting at the point of contact between the plates.How thick is the hair? (1 nm = 10-9 m)

Correct AnswerverifiedShow Answer

When the sun is located near one of the horizons,an observer looking at the sky directly overhead will view partially polarized light.This effect is due to which of the following processes?

Correct AnswerverifiedShow Answer

In order to produce a sustained interference pattern by light waves from multiple sources,which of the following conditions must be met?

Correct AnswerverifiedShow Answer

A diffraction grating has 4000 lines/cm.What is the slit separation?

Correct AnswerverifiedShow Answer

Two closely spaced parallel glass plates are separated by 750 nm.What wavelength light source in the visible region (390 nm to 710 nm) will experience maximum transmission through the two plates?

Correct AnswerverifiedShow Answer

The intensity of unpolarized light passing through a single sheet of polarizing material changes by a factor of:

Correct AnswerverifiedShow Answer

In a Young's experiment,the paths from the slits to a point on the screen differ in length,causing destructive interference at the point.Which of the following path difference would cause this destructive interference?

Correct AnswerverifiedShow Answer

Upon reflection,light undergoes a 180 °\degree° phase change:

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Light travels from outside a building to inside through a pane of glass.Which of the following is true regarding the phase change upon reflection in the case?

Correct AnswerverifiedShow Answer

Two flat glass plates are in contact along one end and are separated by a sheet of paper 4.0 x 10-6 m thick at the other end.The top plate is illuminated by a monochromatic light source of wavelength 490 nm.How many dark parallel bands will be evident across the top plate? (1 nm = 10-9 m)

Correct AnswerverifiedShow Answer

Correct Answer
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Correct Answer
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Correct Answer
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A Young's double-slit apparatus is set up.A screen is positioned 1.60 m from the double slits,and the spacing between the two slits is 0.040 0 mm.The distance between alternating bright fringes is 1.42 cm.What is the light source wavelength? (1 nm = 10^-9 m)

Correct Answer
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In a Young's double-slit experiment,how many maxima occur between the 4^th order maxima?

Correct Answer
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Correct Answer
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A silicon monoxide (n = 1.45) film of 100 nm thickness is used to coat a glass camera lens (n = 1.56) .What wavelength of light in the visible region (390 to 710 nm) will be most efficiently transmitted by this system? (1 nm = 10^-9 m)

Correct Answer
verified

The critical angle for sapphire surrounded by air is 34.4 $\degree$ .Calculate the polarizing angle for sapphire.

Correct Answer
verified

A hair is placed at one edge between two flat glass plates.When this arrangement is illuminated with yellow light of wavelength (l = 600 nm) ,a total of 121 dark bands are counted starting at the point of contact between the plates.How thick is the hair? (1 nm = 10^-9 m)

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Upon reflection,light undergoes a 180 $\degree$ phase change:

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Two flat glass plates are in contact along one end and are separated by a sheet of paper 4.0 x 10^-6 m thick at the other end.The top plate is illuminated by a monochromatic light source of wavelength 490 nm.How many dark parallel bands will be evident across the top plate? (1 nm = 10^-9 m)

Correct Answer
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