12. Red laser light (A = 600 nm) shines through two slits onto a wall that is 5.1 m away, and forms this pattern. +++++++ -0.6 -0.5 -0.4 -0.3 -0.2 -0.1 0.0 0.1 0.2 0.3 0.4 0.5 0.6cm What is the distance between the slits?
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- Waves and Optics. Interference, Diffraction and Polarization2. Unpolarized light of intensity 100 mW/m² passes through two filters. The first filter has an alignment of 30.0 degrees from the vertical. The intensity of the light that passes through the second filter is 41 mW/m². What is the angular alignment of the second filter with respect to the vertical? [2] A. 5° B. 10° C. 15° D. 20° E. 25° F. 30° 3. Which waves travel slowest in vacuum? [1] A. red light B. blue light E. They all travel with the same speed. C. x-rays D. gamma-rays 4. Point out the incorrect statement with respect to an electromagnetic wave in vacuum (or air) [2]. A. The color depends on the wavelength. B. The energy is transported with speed c in the direction of propagation. C. Both the electric field and the magnetic field exist in a plane perpendicular to the direction of propagation. D. The electric and the magnetic fields change in time, but do not change with position in space. E. The electric field vector and the magnetic field vector are always perpendicular to each…A laser illuminates a screen with two small holes drilled in it very close together. The lightemitted from the holes shines on a distant screen. What will be seen on the distant screen?a. A bright central dot surrounded by dimmer concentric circles.b. Two bright dots.c. A series of a few dots that are widely separated.d. A series of many dots that are very close together.
- 10. A ray of light with a wavelength of 480 nm strikes a very thin soap film of thickness 2.00 nm, with air on each side of the film. Which statement is true? a. There will be constructive interference because the path difference is effectively zero, and phase change occurs at only one surface. b. There will be destructive interference because the path difference is effectively zero, and phase change occurs at only one surface. c. There will be constructive interference because the path difference is effectively zero, and phase change occurs at either surface. d. There will be destructive interference because the path difference is effectively zero, and phase change does not occur at either surface.7-27. Which wavelength is not a possibility for a 1 m long pipe open at both ends? O A. 0.25 m O B. 0.5 m OC. 1 m O D. 2 m O E. 4 m Back Save & Continue
- A glass lens has a coating placed on it. If a film of magnesium fluoride, n = 1.38, is placed on the glass, n = 1.52, how thick should the layer be to keep yellow-green light from being reflected? A. 92 nm B. 101 nm C. 140 nm D. 192 nm18. Suppose that you are shining light through a small slit (width = 400 nm). Which will diffract more: a red laser with a wavelength of 650 nm or a green laser with a wavelength of 450 nm? not enough information to determine the diffraction will be the same green laser red laser