2. A light source emits visible light of two wavelengths: A = 400 nm and A' = 500 nm. The source is used in a double-sit interference experiment in which L = 1.2 m and d = 0.030 mm. Find the separation between the third- order bright fringes. %3D
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- 5) You are looking at the fringe pattern on a screen produced by a laser beam passing through a pair of closely-placed slits, and then travelling about a meter until the pattern hits the screen. A) You put a thin sheet of glass over one of the slits (one slit only). The effect of the glass is to add exactly half of a wavelength to the light that passes through that one slit. Explain precisely what effect this will have on the fringe pattern. 1t will be13. Suppose that you have a laser of wavelength 2 = 450 nm, and a single slit with a width of a = 0.16 mm. You plan to place the slit exactly L = 1.00 m away from a viewing screen, but you want to predict the positions of the dark fringes in advance. First, let's check if the small-angle approximation applies to this situation. a. Use på a sin 0 to calculate the angle 8₁ for the first order (p = 1) dark fringes: = b. Calculate sin 0₁: c. Calculate tan 0₁: d. Compare the values for sin 0, and tan 8₁. Are these approximately equal? If so, then we can use the small angle approximation 0, (rad) ≈ P²P for further R a L calculations, and the dark fringes should be equally spaced. S 2015 #10772/ 754911 My PORTALLA 1500 ALTERNA2. Red laser light (X=680 nm) is incident on two narrow, closely-spaced slits. The resulting pattern of bright and dark fringes is projected on a screen, and the centermost bright fringes are seperated by 2.0 cm. If the red laser is replaced with a green (A=500 nm) one, how would the spacing of the centermost fringes change? A. The centermost bright fringes will remain 2.0 cm apart B. The centermost bright fringes will get closer together C. The centermost bright fringes will get farther apart D. No bright fringes would be visible
- 4. What is the wavelength of light falling on double slits separated by 2.00 µm if the second- order maximum is at an angle of 60.0°? 5. Calculate the distance between two adjacent fringes for 633-nm light falling on double slits separated by 0.0800 mm, located 3.00 m from a screen.1. At what angle is the first–order maximum for 440–nm wavelength blue light falling on double slits separated by 0.0400 mm? This is not and will not be graded4. A single slit of width 0.21 mm is illuminated with monochromatic light of wavelength 635 nm, and a diffraction pattern is formed on a screen 2.00 m away from the slit. What is the width of the bright fringe adjacent to the central maximum? cm
- beam of monochromatic light is incident on a single slit of width 0.560 mm. A diffraction pattern forms on a wall 1.20 m beyond the slit. The distance between the positions of zero intensity on both sides of the central maximum is 2.36 mm. Calculate the wavelength of the light. nm A helium-neon laser (A = 632.8 nm) is used to calibrate a diffraction grating. If the first-order maximum occurs at 20.1 Degree , what is the spacing between adjacent grooves in the grating? (In this problem, assume that the light is incident normally on the gratings.) pm White light is spread out into its spectral components by a diffraction grating. If the grating has 1 980 grooves per centimeter, at what angle does red light of wavelength 640 nm appear in first order? (Assume that the light is incident normally on the gratings.)6. Structures on a hummingbird feather act like a diffraction grating having 8000 lines per centimeter. What is the angle of the first-order maximum for 488-nm light? 2 7. When red light illuminates a grating with 7000 lines per centimeter, its second maximum is at 62.4°. What is the wavelength of this light?What is the highest order bright fringe that will be observed when green light of wavelength 550 nm is incident on a Young's double slit apparatus with a slit spacing of 11 µm? a. m = 12 b. m = 16 c. m = 18 d. m = 20 e. m = 14
- When polychromatic visible light shines through a diffraction grating, the colors seen closest to the central maximum will: A. be visible as the lowest wavelength in the mixture B. be visible as the highest wavelength in the mixture C. be a mixture of the wavelengths present D. Always be white#21. In a single-slit experiment, light passes through the slit and forms a diffraction pattern on a screen 2.54 [m] away. If the wavelength of light is 655 [nm], and the width of the slit is 4.41 x 10-5 [m], find the linear distance on the screen from the center of the diffraction pattern to the first dark fringe. Upload Choose a File3. A single slit is used to create an interference pattern on a screen using light. Consider the statements that follow with respect to the pattern generated: I. A longer wavelength of light generates a wider central maximum. II. When using white light, the outer fringes are coloured. III. A narrower slit generates a wider central maximum. Which of the above statements is/are incorrect? a. b. c. I only I and II only I and III only d. e. I, II, and III none