Video Transcript
(5.6s) Filters are used to select certain wavelengths within optical systems. Filters can be broad, transmitting large wavelength ranges, or very specific and targeted only to a few wavelengths. Bandpass filters transmit a band of wavelengths, while blocking the wavelengths on either side of that band. The opposite of a bandpass filter is a notch filter, which blocks a specific band of wavelengths. Longpass filters transmit wavelengths longer than the specified cut-on wavelength and block the shorter wavelengths. Short pass filters are the opposite and transmit the shorter wavelengths. (8.9s)
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