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Exam 34: The Wave Nature of Light; Interference

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Question 21

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The interference pattern observed in Newton's rings experiment is because of the path difference between the top surface and the bottom surface of the air between the pieces of glass.

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Question 22

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In a Young's double slit experiment, what is the ratio of the intensity at a point where the electric fields are out of phase by 30° to the central intensity.

A) 0.93
B) 1.9
C) 2.1
D) 0.47
E) 0.75

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Question 23

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The maximum intensity using coherent sources compared to the maximum intensity using random sources for sources of equal strength is that the maximum in the coherent case is

In the two-slit experiment, the distance between the slits and the screen is 1.1 m and the distance between the slits is 0.040 mm. If the first-order bright fringe is measured to be 3.4 cm from the centerline, what is the distance between the adjacent bright fringes?

Light of wavelength 500 nm illuminates a soap film ( n = 1.33) . What is the minimum thickness of film that will give an interference maximum when the light is incident normally on it?

A wave that travels from a medium of lower index of refraction to a medium of higher index of refraction undergoes 180° phase changes relative to the incident wave.

In a Newton's rings apparatus, the interference effect observed between the rays occurs because of the path difference between

Sources are coherent if

If the movable mirror in a Michelson interferometer is moved 120 microns, how many fringes would be counted for 600 nm light?

In the two-slit experiment, monochromatic light of wavelength 600 nm passes through a pair of slits separated by 2.20 x 10^-5 m. (a) What is the angle corresponding to the first bright fringe? (b) What is the angle corresponding to the second dark fringe?

At the second maxima on either side of the central bright spot in a double-slit experiment, light from

In a double-slit experiment, the intensity of light at the center of the central fringe is measured to be 6.2 × 10^-6 W/ m². What is the intensity halfway between the center of the fringe and the first dark band?

Two light sources are said to be coherent if they

Two beams of coherent light travel different paths arriving at point P. If the maximum constructive interference is to occur at point P, what should be the phase difference between the two waves?

Two flat glass plates, 10.0 cm wide, touch at one end but are separated by a thin wire at the other end, forming a wedge. Light with a wavelength of 450 nm shines almost perpendicularly on the glass and forms fringes which are 1.80 mm apart. What is the diameter of the wire?

How far would the movable mirror in a Michelson interferometer need to be moved for 800 fringes to be counted using 633 nm light?

In the two-slit experiment, for the condition of dark fringes, the value of m = +1 corresponds to a path difference of 3λ/2.

According to Huygens' principle, each point on a wave can be considered as the source of a new wave that propagates from that point onward.

Light from a 600 nm source goes through two slits 0.080 mm apart. What is the angular separation of the two first order maxima occurring on a screen 2.0 m from the slits?

Two pieces of optically flat glass (n = 1.50) touch at one edge and a separated by a thin stretched fiber at the opposite edge. Light of wavelength 500 nm is shone from above and 100 dark fringes are counted. How thick is the fiber?