Filters

In astronomy, filters are used to isolate specific wavelengths of light to study celestial objects in different parts of the electromagnetic spectrum. By blocking out unwanted wavelengths and allowing only those within a particular range to pass through, filters enable astronomers to analyze the properties and compositions of stars, galaxies, and other astronomical phenomena more precisely. Filters are commonly used in various types of telescopes and imaging instruments, such as photometers and CCD cameras. They can be designed to cover specific regions like ultraviolet, visible, or infrared light, allowing astronomers to observe features that might be hidden or obscured in broader wavelength ranges.