Based on the relative luminosity curve shown in the figure, determine the relative luminosity of wavelength 480 nm .

Step-by-step solution

From the standard relative luminosity curve for photopic vision, the peak relative luminosity is 1.0 at a wavelength of 555 nm . As the wavelength increases from 555 nm to 600 nm , the relative luminosity decreases. Based on the standard curve (or the specific curve provided in such problems), the relative luminosity at 600 nm is approximately 0.63 to 0.66 . Reading directly from the given figure, the value corresponds to 0.66 .