A stardust resonant filter is a sort of optical filter that makes use of the resonant properties of sure supplies to selectively replicate or transmit mild of particular wavelengths. Such a filter is usually utilized in astronomy to isolate particular spectral traces, such because the hydrogen alpha line, for additional examine.
Stardust resonant filters are usually constituted of a skinny layer of fabric that’s deposited on a substrate. The fabric is chosen to have a resonant frequency that corresponds to the wavelength of sunshine that’s to be filtered. When mild of this wavelength strikes the filter, it’s absorbed by the fabric after which re-emitted in a selected route. This permits the filter to selectively replicate or transmit mild of a selected wavelength.
