1. An unpolarized beam of light is incident on a pane of glass (n = 1
An unpolarized beam of light is incident on a pane of glass (n = 1.56) such that the reflected component coming off the glass is completely polarized. What is the angle of incidence in this case?
32.7°
41.0°
49.0°
57.3° 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

2. A beam of light of 650 nm wavelength is incident along the normal to two closely spaced parallel glass plates. For what air gap separation between the plates will the transmitted beam be of maximum intensity? (1 nm = 10-9 m)
81 nm
163 nm
325 nm
488 nm 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

3. Two closely spaced parallel glass plates are separated by 750 nm
Two closely spaced parallel glass plates are separated by 750 nm. What wavelength light source in the visible region (390 nm nm) will experience maximum transmission through the two plates?
500 nm
429 nm
600 nm
684 nm 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

4. 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 490 nm wavelength. How many dark parallel bands will be evident across the top plate? (1 nm = 10-9 m) 7 9 13 17 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

5. reflection double refraction selective absorption scattering
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?
reflection
double refraction
selective absorption
scattering 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

6. Light of wavelength 610 nm is incident on a slit of width
Light of wavelength 610 nm is incident on a slit of width .20 mm and an interference pattern is produced on a screen that is 1.5 m from the slit. What is the width of the central bright fringe? (1 nm = 10-9 m)
0.68 cm
0.92 cm
1.22 cm
1.35 cm 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

7. Light of wavelength 610 nm is incident on a slit of width
Light of wavelength 610 nm is incident on a slit of width .20 mm and an interference pattern is produced on a screen that is 1.5 m from the slit. What is the distance of the second dark fringe as measured from the center of the bright fringe? (1 nm = 10-9 m)
0.68 cm
0.92 cm
1.22 cm
35 cm 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

8. Polarization of light can be achieved using a dichroic material like polaroid by which of the following processes?
reflection
double refraction
selective absorption
scattering 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

9. Polarization of light can be achieved using birefringent materials by which of the following processes?
reflection
double refraction
selective absorption
scattering 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

10. A silicon monoxide (n = 1.45) film of 270 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)
409 nm
492 nm
522 nm
638 nm 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

11. What wavelength monochromatic source in the visible region (390 to 710 nm) can be used to constructively reflect off a soap film (n = 1.46) if the film is 77 nm thick? (1 nm = 10-9 m)
409 nm
430 nm
450 nm
558 nm 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

12. What wavelength monochromatic source in the visible region (390 to 710 nm) can be used to constructively reflect off a soap film (n = 1.46) if the film is 240 nm thick? (1 nm = 10-9 m)
467 nm
562 nm
587 nm
480 nm 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

13. 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)
400 nm
492 nm
624 nm
580 nm 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

14. 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 0.04 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)
0.16 cm
0.32 cm
0.48 cm
0.64 cm 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

15. A Young's double slit apparatus is set up where a screen is positioned 1.6 m from the double slits and the spacing between the two slits is 0.04 nm. If the distance between alternating bright fringes is 1.42 cm, what is the light source wavelength? (1 nm = 10-9 m)
430 nm
490 nm
280 nm
355 nm 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

16. A Young's double slit apparatus is set up where a screen is positioned 0.8 m from the double slits. If the distance between alternating bright fringes is 0.95 cm and the light source has a wavelength of 580 nm, what is the separation of the double slits? (1 nm = 10-9 m)
2.8 x 10-5 m
4.9 x 10-5 m
5.6 x 10-5 m
6.0 x 10-5 m 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

17. A Young's double slit apparatus is set up where the source wavelength is 430 nm and the double slit spacing is 0.04 mm. At what distance from the double slits should the screen be placed if the spacing between alternating bright fringes is to be 2.4 cm? (1 nm = 10-9 m)
1.6 m
2.23 m
2.4 m
2.9 m 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

18. A Young's double slit apparatus is set up so that a screen is positioned 1.6 m from the double slits and the spacing between the two slits is 0.04 mm. What is the distance between alternating bright fringes on the screen if the light source has a wavelength of 630 nm? (1 nm = 10-9 m)
0.016 m
0.025 m
0.032 m
0.047 m 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

19. In a Young's double slit interference apparatus, by what factor is the distance between adjacent light and dark fringes changed when the separation between slits is tripled?
1/9
1/3
1.0
3.0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

20. In a Young's double slit interference apparatus, by what factor is the distance between adjacent light and dark fringes changed when the separation between slits and screen is tripled?
1/9
1/3
1.0
3.0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

21. In a Young's double slit interference apparatus, by what factor is the distance between adjacent light and dark fringes changed when the wavelength of the source is tripled?
1/9
1/3
1.0
3.0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

22. A Fraunhofer diffraction pattern is created by monochromatic light shining through which of the following?
single slit
double slit
triple slit
more than 3 slits 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

23. The dark spot observed in the center of a Newton's rings pattern is attributed to which of the following?
polarization of light when reflected
polarization of light when refracted
phase shift of light when reflected
phase shift of light when refracted 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

24. sources are monochromatic sources are either coherent or monochromatic
In order to produce a sustained interference pattern by light waves from multiple sources, which of the following conditions must be met?
sources are coherent
sources are monochromatic
sources are either coherent or monochromatic
none of these 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

25. What is the minimum thickness of a soap bubble film (n = 1
What is the minimum thickness of a soap bubble film (n = 1.46) on which light of wavelength 500 nm shines, assuming one observes constructive interference of the reflected light?
63 nm
86 nm
125 nm
172 nm 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

26. Light of wavelength 500 nm shines on a soap bubble film (n = 1. 46)
Light of wavelength 500 nm shines on a soap bubble film (n = 1.46). For what soap film thickness, other than the minimum thickness, will constructive interference occur?
63 nm
86 nm
172 nm
257 nm 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

27. A silicon monoxide thin film (n = 1. 45) of thickness 97
A silicon monoxide thin film (n = 1.45) of thickness 97.4 nm is applied to a camera lens made of glass (n = 1.58). This will result in a destructive interference for reflected light of what wavelength?
720 nm
616 nm
565 nm
493 nm 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

28. A Young's double slit has a slit separation of 3
A Young's double slit has a slit separation of 3.0 x 10-5 m on which a monochromatic light beam is directed. The resultant bright fringe separation is 2.15 x 10-2 m on a screen 1.2 m from the double slit. What is the separation between the third order bright fringe and the zeroth order fringe?
60 x 10-2 m
6.45 x 10-2 m
4.30 x 10-2 m
2.15 x 10-2 m 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

29. A beam of unpolarized light in air strikes a flat piece of glass at an angle of incidence of 57.33°. If the reflected beam is completely polarized, what is the index of refraction of the glass?
1.60
1.56
1.52
2.48 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

30. grey fringe, neither dark nor bright
If a wave from one slit of a Young's double slit set-up arrives at a point on the screen one wavelength behind the wave from the other slit, what is observed at that point?
dark fringe
bright fringe
multi-colored fringe
grey fringe, neither dark nor bright 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

31. The blue tint of a coated camera lens is largely caused by what effects?
diffraction
refraction
polarization
interference 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

32. A Young's double slit has a slit separation of 4
A Young's double slit has a slit separation of 4.0 x 10-5 m on which a monochromatic light beam is directed. The resultant bright fringes on a screen 1.20 m from the double slit are separated by 2.15 x 10-2 m. What is the wavelength of this beam? (1 nanometer = 10-9 m)
573 nm
454 nm
717 nm
667 nm 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

33. electro-magnetic character
Interference effects observed in the early 1800's were instrumental in supporting a concept of the existence of which property of light?
polarization
particle nature
wave nature
electro-magnetic character 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

34. If the polarizing angle for cubic zirconia is 65
If the polarizing angle for cubic zirconia is 65.6°, what is the index of refraction of this material?
2.00
2.20
2.42
2.65 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

35. The critical angle for sapphire surrounded by air is 34. 4°
The critical angle for sapphire surrounded by air is 34.4°. Calculate the polarizing angle for sapphire.
60.5°
59.7°
58.6°
56.3° 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

36. Sunlight reflected from a smooth ice surface is completely polarized
Sunlight reflected from a smooth ice surface is completely polarized. Determine the angle of incidence. (nice = 1.309)
25.60°
47.89 °
52.62 °
56.26 ° 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

37. A hair is placed at one edge between two flat glass plates
A hair is placed at one edge between two flat glass plates. When this arrangement is illuminated with yellow light of wavelength ( λ = 600 nm), a total of 121 dark bands are counted starting at the point of contact between the plates. How thick is the hair?
3.6 x 10-5 m
1.8 x 10-5 m
3.6 x 10-4 m
1.8 x 10-4 m 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

38. A thin film of magnesium fluoride (n = 1
A thin film of magnesium fluoride (n = 1.38) is used to coat a camera lens (n = 1.56). Which of the following thicknesses of coating will not allow any strong reflections in the visible spectrum ( λ = 390 nm to λ = 700 nm)?
1 x 10-5 cm
2 x 10-5 cm
5 x 10-5 cm
1 x 10-4 cm 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

39. How far above the horizon is the moon when its image reflected in calm water is completely polarized? (nwater = 1.333)
7.7°
16.6°
22.2°
36.87° 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

40. A possible means for making an airplane radar-invisible is to coat the plane with an antireflective polymer. If radar waves have a wavelength of 3 cm and the index of refraction of the polymer is n = 1.5, how thick would the coating be?
1 mm
2 mm
5 mm
2 cm 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

41. The blue light from the sky has been polarized by?
selective absorption.
reflection.
double refraction.
scattering. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

42. A Young's interference experiment is conducted with blue-green argon laser light ( λ = 515 nm). The separation between the slits is 0.5 mm and the interference pattern appears on a screen 3.3 m away. What is the spacing between the bright fringes?
1.7 mm
3.4 mm
5.1 mm
6.8 mm 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

43. Helium-neon laser light ( λ = 632. 8 nm) is sent through a 0
Helium-neon laser light ( λ = nm) is sent through a 0.3 mm-wide single slit. What is the width of the central maximum on a screen 1 m in back of the slit?
2.02 mm
3.13 mm
4.22 mm
5.31 mm 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

44. 620 nm (red) 580 nm (yellow) 540 nm (green) 500 nm (blue)
A soap bubble (n = 1.35) is floating in air. If the thickness of the bubble wall is 300 nm, which of the following wavelengths of visible light is strongly reflected?
620 nm (red)
580 nm (yellow)
540 nm (green)
500 nm (blue) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

45. A thin layer of oil (n = 1. 25) is floating on water (n = 1. 33)
A thin layer of oil (n = 1.25) is floating on water (n = 1.33). How thick is the oil in the region that reflects green light ( λ = 530 nm)?
212 nm
313 nm
404 nm
500 nm 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

46. selective absorption. reflection. double refraction. scattering.
When light from a single point passes through calcite it often forms two images, each of which is formed from light that has been polarized by?
selective absorption.
reflection.
double refraction.
scattering. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

47. 1/8 of a wavelength of the light. 1/4 of a wavelength of the light.
Light is reflecting off a wedge-shaped thin piece of glass producing bright and dark interference fringes. If a certain location has a bright fringe, a nearby point will have a dark fringe if the thickness of the glass increases by?
1/8 of a wavelength of the light.
1/4 of a wavelength of the light.
1/2 of a wavelength of the light.
one wavelength of the light. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

48. Which statement is correct?
A double slit interference pattern does not require diffraction.
A single slit diffraction pattern does not require interference.
Diffraction, refraction, and reflection all can cause the path of light not to be a straight line path.
Polarization involves interference. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

49. selective absorption. reflection. double refraction. scattering.
Polaroid sunglasses help when skiing on snow on a sunny day by reducing the sunlight from the snow. This light from the snow has been polarized by?
selective absorption.
reflection.
double refraction.
scattering. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

50. Polaroid material made from a dichroic substance polarizes light by?
selective absorption.
reflection.
double refraction.
scattering. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

51. When light passes from a material with a high index of refraction into material with a low index of refraction?
none of the light is reflected.
some light is reflected without a change of phase.
some light is reflected with a 180° change of phase.
the light that is not reflected has a 108° change of phase. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

52. When light shines on a lens placed on a flat piece of glass, interference occurs which causes circular fringes called Newton's rings. The two beams that are interfering come from?
the top and bottom surface of the lens.
the top surface of the lens and the top surface of the piece of glass.
the bottom surface of the lens and the top surface of the piece of glass.
the top and bottom surface of the flat piece of glass. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

53. The center spot of Newton's rings is dark
The center spot of Newton's rings is dark. This destructive interference occurs because?
the two beams travel distances that are different by half a wavelength.
both waves change phase by 180° as they are reflected.
one beam changes phase by 180° when it is reflected.
both waves have a trough. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

54. If the 2nd order fringe in Young's double slit experiment occurs at an angle of 45°, what is the relationship between the wavelength λ and the distance between slits, d?
d = 1.414λ
d = 2 λ
d = 2.83 λ
d = 4 λ 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

55. Two beams of coherent light are shining on the same piece of white paper. When referring to the crests and troughs of such waves, darkness will occur on the paper where?
the crest from one wave overlaps with the crest from the other.
the crest from one wave overlaps with the trough from the other.
the troughs from both waves overlap.
darkness cannot occur as the two waves are coherent. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

56. the extra distance one beam must travel
After light from a source passes through two slits, a first order bright spot is seen on the wall at point P. Which distance is equal to the wavelength of the light?
the extra distance one beam must travel
the distance between beams as they leave the slit
the distance of point P from the central point of the interference pattern
the distance between slits 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

57. Waves from a radio station with a wavelength of 400 m arrive at a home receiver a distance 30 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?
100 m
200 m
300 m
400 m 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

58. At what angle is the sun above the horizon if its light is found to be completely polarized when it is reflected from the top surface of a slab of glass (n = 1.65)?
31.2°
44.4°
58.8°
66.6° 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

59. A Fraunhofer diffraction pattern is produced on a screen 1
A Fraunhofer diffraction pattern is produced on a screen 1.3 m from a single slit. If a light source of 560 nm is used and the distance from the center of the central bright fringe to the first dark fringe is 5.3 x 10-3 m, what is the slit width? (1 nm = 10-9 m)
0.69 x 10-4 m
1.37 x 10-4 m
1.00 x 10-4 m
0.81 x 10-4 m 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

60. Two flat glass plates are in contact along one end and are separated by a sheet of tissue paper at the other end. A monochromatic source of 490 nm illuminates the top plate. If 21 dark bands are counted across the top plate, what is the paper thickness? (1 nm = 10-9 m)
2.7 x 10-6 m
3.4 x 10-6 m
4.9 x 10-6 m
5.8 x 10-6 m 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50