That all points on a wave front act as new sources of spherical waves is attributed to:
a. Maxwell. b. Young.
c. Thomas. d. Huygens.
[Ques. 2] In a single-slit diffraction experiment, the width of the central maximum is 6.0 mm. The width of the slit is then doubled as is the distance to the screen. What is the resulting width of the central maximum?
a. 12 mm b. 6.0 mm
c. 24 mm d. 3.0 mm
[Ques. 3] In a single-slit diffraction experiment, the angular width of the central maximum is 0.16. The width of the slit is then doubled as is the distance to the screen. What is the resulting angular width of the central maximum?
a. 0.64 b. 0.080
c. 0.32 d. 0.16
[Ques. 4] In the straight-ahead direction ( = 0) in Fraunhofer diffraction, which of the following is observed on the screen?
a. a minimum equal in width to the adjacent minima
b. a minimum double in width to the adjacent minima
c. a maximum equal in width to the adjacent maxima
d. a maximum double in width to the adjacent maxima
[Ques. 5] Helium-neon laser light ( = 632.8 nm) is sent through a single slit of width 0.55 mm. What is the width of the central maximum on a screen 1.4 m in back of the slit? (1 nm = 109 m)
a. 1.6E3 m
b. 8.0E4 m
c. 3.2E3 m
d. 7.5E5 m
e. 1.5E4 m
[Ques. 6] A Fraunhofer diffraction pattern is produced from a light source of wavelength 460 nm. The light goes through a single slit and onto a screen 0.9 m away. The first dark fringe is 4.5 mm from the central bright fringe. What is the slit width? (1 nm = 109 m)
a. 1.8E4 m
b. 9.2E5 m
c. 3.1E5 m
d. 1.4E4 m
e. 2.0E2 m
[Ques. 7] Light of wavelength 420 nm is incident on a slit of width 0.20 mm, and a diffraction pattern is produced on a screen that is 1.80 m from the slit. What is the width of the central bright fringe? (1 nm = 109 m)
a. 3.8E3 m
b. 7.6E3 m
c. 1.2E3 m
d. 1.4E2 m
e. 2.0E2 m
[Ques. 8] Light of wavelength 418 nm is incident on a slit of width 0.35 mm, and a diffraction pattern is produced on a screen that is 2.4 m from the slit. What is the distance of the second dark fringe from the center of the bright fringe? (1 nm = 109 m)
a. 2.9E7 m
b. 5.7E3 m
c. 1.6E3 m
d. 1.4E6 m
e. 1.1E6 m
[Ques. 9] A Fraunhofer diffraction pattern is created by monochromatic light shining through which of the following?
a. single slit
b. double slit
c. triple slit
d. more than 3 slits
[Ques. 10] A silicon monoxide thin film (n = 1.45) of thickness 77.6 nm is applied to a camera lens made of glass (n = 1.55). This will result in a destructive interference for reflected light of what wavelength?
a. 720 nm b. 558 nm
c. 450 nm d. 522 nm
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