A stardust resonant filter is a sort of optical filter that makes use of the resonant properties of sure supplies to selectively mirror or transmit mild of particular wavelengths. One of these filter is usually utilized in astronomy to isolate particular spectral traces, such because the hydrogen alpha line, for additional research.
Stardust resonant filters are usually constructed from 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 course. This permits the filter to selectively mirror or transmit mild of a selected wavelength.
