Hi guys,
so i am taking physics right now, and we just started interference with slits. We have done thin film and double slit interference, but I am confused about the difference. Is thin film interference basically a bunch of slits all together, say 5000/cm, and all you must do is figure out the distance between two? then it is just one more step longer than a double slit interference problem...
also, what is diffraction grating?
thank you!|||A diffractive grating splits light up into its chromatic components or divides it by its spectral order. Now an optical thin film is a coating, usually a evaporated or sputtered metal that with a precise thickness of quater wave, half wave thickness with respect to the wavelength the coating is designed to work with. In other words, a 550nm 1/4 wave AR coating is slightly different thickness than a 450nm 1/4 wave AR coating. But the idea is the coating minimizes back reflection.Thin films can also be design to be optical bandpass filters or line filters etc. so they don't do the same thing that a grating does. Get it?
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