<prompt> Pfupisa nyaya yacho: Mifananidzo yake ndeimwe yeinokosha zvikurusa munyika - bva yakawanda yayo iri kunyangarika zvishoma nezvishoma. Zvino masayendisiti akawana kuti basa guru raVincent Van Gogh riri kuva nyajambwa wokusarudza kwomuenzi mavara ayo akashandisa mupendi yake. Vakawana kuti chimwe chinhu chisingawanzowaniki chiri mupendi yakatsvuka zvikuru yaishandiswa nomunyori wechiDutch ari kuchinja kuva chena sezvo chinoputsika kuva makristasi machena ane madzerere. Dzorera pasi kuti uone vhidhiyo. Mavara ari mumufananidzo waVan Gogh unonzi Sunflowers, mifananidzo miviri yawo inoratidzwa pamusoro apa iri kuratidzwa paNational Gallery, anotyiwa kuti akachinjawo sezvo mavara eruvara rwegoridhe nerutsvuku akaderera nokufamba kwenguva. Mimwe mienzaniso yemifananidzo yaVan Gogh yakawanikwa iine mineral inonzi plumbonacrite ine mutobvu unopindirana necarbon dioxide iri mumhepo. Vanoti chicherwa ichi ndicho chinobatanidza chisipo chinogona kutsanangura chikonzero nei pendi tsvuku inotungamirira, inozivikanwa seyakaderera, iri kuva chena. Mutobvu mutsvuku hausi iwo mavara okutanga anowanwa mumabasa aVan Gogh ayo ari kukundikana kumira nomuedzo wenguva. Vatsvakurudzi vakazivisa misi ichangobva kupfuura iyi kuti ruvara rutsvuku rwomugungwa rwaakashandisawo rwave ruchinyangarika. Ikoku kwakanga kwavatungamirira kugumisa kuti irises dzebhuruu dzeMunda wake neIrises pedyo neArles, dzakapendwa muna 1888, dzakanga dziri ruvara rwepepuru pakutanga. Vachengeti veVan Gogh Musuem muAmsterdam vakawanawo kuti mavara ari muimba yokurara yaVan Gogh ari kuperawo pabasa rokudzorera mufananidzo wacho. Vakawana mutsamba dzaakanyorera munununa wake nehanzvadzi, Van Gogh akarondedzera zvakadzama mavara akajeka eimba yake. Izvi zvakaita kuti masayendisiti agadzirise kuti mufananidzo wacho waizenge wakaita sei pakutanga. Vakawana kuti pasi rakasvibira raifanira kuva neruvara rwakajeka rwepepuru nepeach nepo madziro ebhuruu akanga ari orenji-tsvuku nepepuru. Basa rapfuura rakagadzirwa naPurofesa Janssens rakaratidzawo kuti pendi yero inopenya, inozivikanwa seye yero yechrome, mumifananidzo yaVan Gogh yave ichichinjawo ruvara. Pavakaiswa muchiedza cheultraviolet, chikwata chake chakawana ruvara rwakajeka rweruvara rune ruvara rweorenji rwakasviba ruchiva ruvara rwebhuruu. Anotenda kuti...  <response>: Ruvara rutsvuku rwomutobvu rwakashandiswa naVincent van Gogh rwakawanikwa ruchiva. Zvinhu zvisina kuchena zviri mupendi zvingave zvakakonzera kuita kwemakemikari muchiedza chezuva. Masayendisiti akawana chicherwa chisingawanzowaniki chinotungamira chave chichiumbwa mupendi. Izvi zvinobva zvaita kuti carbon dioxide inobva mumhepo iite makristasi machena. Vanonyevera kuti mifananidzo yakawanda yomunyori ingangova mungozi yeiyi nhano. Vakaongorora Wheat Stack Under a Cloudy Sky ndokuwana kuti yakanga yapera. 