![]() There must be a phase change upon reflection at the top of the oil film but no What is the angle corresponding to the m = 3 principal maximum? Suppose a diffraction grating has slits separated by 6 times the wavelength of light used to illuminate the grating. If a diffraction grating is replaced by one that has more lines per centimeter, the angle to the second-order maximum will _. If λ = 514 nm and 22 bright fringes are observed across an object, by how much did oneĮnd of the object flex with respect to the other? ![]() What is the wavelength of the light?Īn interferometric hologram has light and dark bands that are analogous to the interference fringes of an air Light falling normally on a 5695 line/cm grating produces a second-order bright line at 44.2°. ![]() The dispersions are equal but orders are sharper with 6000 lines/cm grating. The dispersions are equal but orders are sharper with 4000 lines/cm grating.ĭ. The 6000 lines/cm grating produces greater dispersion.Ĭ. The 4000 lines/cm grating produces greater dispersion.ī. Of refraction of the oil is _ than that of the water.Ĭompare a 4000 lines/cm diffraction grating with a 6000 lines/cm grating.Ī. The oil film floating on water in the photo appears dark near the edges, where it is thinnest. Read the textbook section on diffusion (on Canvas) before the next lecture
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