5. Draw an illustration of interfering waves. Which portions of the waves shows constructive interference? Why? Which portions shows destructive interference? Why?
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5. Draw an illustration of interfering waves. Which portions of the waves shows constructive interference? Why? Which portions shows destructive interference? Why?
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- Two narrow, parallel slits separated by 0.850 mm are illuminated by 600-nm light, and the viewing screen is 2.80 in away from the slits. (a) What is the phase difference between the two interfering waves on a screen at a point 2.50 mm from the central bright fringe? (b) What is the ratio of the intensity at this point to the intensity at the center of a bright fringe?15. Waves from a radio station have a wavelength of 300 m. They travel by two paths to a home receiver 20.0 km from the transmitter. One path is a direct path, and the second is by reflection from a mountain directly behind the home receiver. What is the minimum dis- tance from the mountain to the receiver that produces destructive interference at the receiver? (Assume that no phase change occurs on reflection from the mountain.)8. A 26m wavelength of a radio wave is produced by two sources simultaneously. The interference of these two waves are observed at a point on a line perpendicular to the source. The sources are at a distance 78 and 143m away from the point of observation. Describe the nature of interference at the point and also find the order of the max/min reception at that point.
- 1. Interference: Calculate the angle between propagation directions of two waves to obtain an interference pattern of two monochromatic plane waves at 530 nm (green light) with period of interference L = 1 mmIn two source interference, the maximum intensity occurs when a. the wavelength is half of the path difference b. the path difference is thrice of the wavelength c. both a and b d. neither a nor b e. cannot be determined3. A lossy medium is with a refractive index n=1.5+0.0015*i. If the initial power intensity of a plane wave at the wavelength of 1.5 um is lin and the power intensity of the plane wave after propagating 1 mm inside the lossy medium is lout, then the optical loss is given by Lo=10 log1,(/out/lin) in dB scale. Please determine the loss value of Lo. (Note that log 1, e = 0.4343)
- The path length difference between two interfering waves in a double-slitexperiment is 3/2. The interference is a. constructiveb. destructivec. polarizedd. superimposed4. Two coherent point sources 7.5 cm apart create an interference pattern in a ripple tank. There are 8 nodal lines in the entire interference pattern. Determine the wavelength of the water waves.2) A thin film of n=1.3 is on top of a substrate of n=1.5 as shown. The thickness of the film is 0.2μm. i. If a certain color of light has frequency 1.0E12 Hz in air, what is the light's frequency in the thin film? A. 6.7E11 Hz B. 8.7E11 Hz C. 1.0E12 Hz D. 1.2E12 Hz E. 1.5E12 Hz ii. Which of the following colors of light (as measured in air) will experience perfectly destructive interference on reflection? A. 308 nm B. 400 nm C. 520 nm D. 615 nm E. 1040 nm n=1 + n 1.3 n 1.5
- Reflections from a thin layer of air between two glass plates cause constructive interference for a particular wavelength of light λ. By how muchmust the thickness of this layer be increased for the interference to be destructive?A. λ/8 B. λ/4 C. λ/2 D. λ4. A thin sheet of plastic (n infrared (A = 700 nm) losses. a) What thickness (in nm) is necessary to produce constructive interference in the reflected infrared radiation? 1.60) is inserted between two panes of glass (n=1.50) to reduce b) What is the shortest wavelength visible light ( 400-700 nm) with destructive interference in the reflected radiation?14. Light of one frequency is incident on a soap bubble floating in the air. If the wavelength in the soap is 6.00 nm, determine the thinnest soap film that can cause constructive interference. A. 1.50 nm B. 3.00 nm C. 12.00 nm D. 24.00 nm < <
