Laambada jeermiga ee ultraviolet-ka xorta ah ee xooga sare leh ee khaaska ah iyo kaarboonka yar ee kaarboonka osoonized ahama birta aan lahayn ee leh daawaynta gaarka ah ee gidaarka gudaha ayaa la qaatay.Dhinaca dibadda ee dhululubada si gaar ah ayaa loo nadiifiyey, si biyaha hore loo sii daayay lagu shidi karo shucaaca ultraviolet ee 253.7nm marka uu dhex maro dhululubada, kaas oo leh saameyn nadiif ah oo wanaagsan oo si wax ku ool ah u yareeya saameynta biyaha saafiga ah ee ultra.