Dependence of a receptor or sensory response on wavelength. Define whether the measurement concerns a pigment, receptor, circuit or behaviour.
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Spectral sensitivity refers to the sensitivity of an organism's visual system or a photodetector to different wavelengths of light. It is a crucial concept in fields like biology, vision science, and optics. In the context of biology, different species have varying spectral sensitivities depending on the types of photoreceptors they possess (like rods and cones in vertebrates).