Question

need all parts for 13

13. Iwo lights that have different wavelengths and intensities may look the same (match). A color match between two lights occurs when - for each come the response to one light equals e response to the other light. When this happens there is no way that the visual system can en the two lights apart. Such lights are known as "metamers" (physically different lights that look identical). For example, liebts A and B below may be physically different, but you will not be able to tell them apart if the come responses on each side are the same. Color matching experiments measure how you have to adjust the intensity of one light (e.g. light B) to match the appearance of another light (e.g. light A). cone responses to light A cone responses to light B a. For the Scones, what would we have to set the intensity (soo) of a 500 nm light to, in order to match the response to a 430 nm light with intensity = 202 (Use Table 1 to get the Scone sensitivity at 430 nm and 500 nm.) Note we can write the match as an equation: response to light A - response to light B 20 x the sensitivity at 430 - Isoo x the sensitivity at 500 (Sresponse ar 430 m) = (Sresponse ar 500 m) the required intensity of the 500 nm light (Isoo) - b. For the M cones, what would we have to set the intensity (soo) of a 500 nm light to, in order to match the response to a light composed of a mixture of 10 units of 450 nm +20 units of 600 nm? (Again use Table 1 to get the M cone sensitivities.) 10 X M sensitivity at 450 + 20 x M sensitivity at 600 - 1500 X the M sensitivity at 500 (M response to the mixture of 450 + 600 m) - M response at 500 nm) the required intensity of 500 nm light (Isoo) =

Answer 1

a) rm he tale , S for 430 /0-0.0821 0.827 0.9623 0. 103 lo Dsu X0/05 20x 0.827 20R0.827 151.7 O.109 fhus, reguined interihy atesity 1sre= !51.7 6 Ajain sing table , -0.979y 6104 Y50 10 0.519 8 0 S02 1 M fir 10 0.3337 0.463. (10 x 0.104) t (20 x 0.302) 150x 0Y6S 2500 104 t6.04 (S.29 17 0.Y63 15.29