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- In a photodetector, the ratio of the electrical output to the optical input. Note 1: Responsivity is usually expressed in amperes per watt, or volts per watt, of incident radiant power. Note 2: Responsivity is a function of the wavelength of the incident radiation and the bandgap of the material of which the photodetector is made. Deprecated synonym sensitivity.
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- aperture, radiant emittance, radiant energy, radiant intensity, radiant power, shielding effectiveness, threshold frequency