
photopic kazhcha

nalla prakashamulla avasthakalil (prakaashatthinte alavu 10 muthal 108 sidi/emm 2 vare) kanninte kazhchayaanu photopic kazhcha. manushyarilum mattu pala mrugangalilum, photopic kazhcha varnnadhaaranam anuvadikkunnu, koonn koshangalude madhyasthathayil, scotopic kaazhchayil labhyamaayathinekkaal ganyamaayi uyarnna vishwal akvittiyum temporal resolution.
manushyante kannu moonnu tharam konukal upayogichu moonnu baand nirangalil prakasham manassilakkunnu. konukalude jaiva pigmentukalkku ekadesham 420 enm (neela), 534 enm (neela-pacha), 564 enm (manja-pacha) tharamgadairkhyathil paramavadhi agiranam moolyangalundu. drishyamaaya spektrathiludaneelam kazhcha nalkunnathinu avayude censitivity shrenikal ovarlaappu cheiyunnu. 555 enm (pacha) tharamgadairkhyathil 683 elm/dablyu aanu paramavadhi falaprapti. nirvachanamanusarichu, hearts aavruthiyilulla prakaashathinu 683 elm/dablyu prakaashakshamathayund.
oru vyakthi photopic aayirikkumbozhulla tharamgadairkhyam prakaashatthinte theevratha anusarichu vyathyaasappedunnu. neela-pacha mekhalaykku (500 enm), prakaashatthinte 50 sathamaanavum rettinayude imej pooyintil athunnu.
photopic kaazhchayil poruthappedutthal valare vegathilaanu; photopic kaazhchaykk ithu 5 minittinullil sambhavikkaamenkilum photopic kaazhchayil ninnu scotopicilekku marran 30 minitt eduthekkaam.
prayamaaya mikka manushyarkkum photopic speshyal kontraast censitivity nashtappedunnu. 70-kalil praayamulla muthirnnavarkk avarude 20-kalil praayamulla muthirnnavarekkaal uyarnna speshyal freekwansikal kandethaan moonniratti kooduthal kontraast aavasyamaanu.
manushyante kannu kuranja prakasha saahacharyangalil (prakasha nila 10−6 muthal 10−3.5 sidi/emm2 vare) scotopic kazhchayum idatharam saahacharyangalil (prakasha nila 10−3 muthal 100.5 sidi/emm2 vare) mesopic kazhchayum upayogikkunnu.