CAN YOU GUYS PLEASE ANSWER THIS QUESTIONS

1. Figure Q18.14 shows a light wave incident on and passing through a thin soap film. Reflections from the front and back surfaces of the film create smaller waves (not shown in the figure) that travel to the left of the film, where they interfere. Is the interference constructive, destructive, or something in between? Explain. Figure Q18.1 Soap film Incident wave 2. Antireflection coatings for glass usually have an index of refraction that is less than that of glass. Explain how this permits a thinner coating. 3. Figure Q18.34 shows the viewing screen in a double-slit experiment with monochromatic light. Fringe C is the central maximum. a. What will happen to the fringe spacing if the wavelength of the light is decreased? b. What will happen to the fringe spacing if the spacing between the slits is decreased? c. What will happen to the fringe spacing if the distance to the screen is decreased? d. Suppose the wavelength of the light is 500 nm. How much farther is it from the dot on the screen in the center of fringe E to the left slit than it is from the dot to the right slit?12. A beam of x rays that have wavelength a impinges on a solid surface at a 30. angle above the surface. These x rays produce a strong reflection. Suppose the wavelength is slightly decreased. To continue to produce a strong reflection, does the angle of the x-ray beam above the surface need to be increased, decreased, or maintained at 30