A na-akpọkwa ndị na-egbuke egbuke anya dị ka ihe na-egbuke egbuke anya ma ọ bụ ihe na-acha ọcha fluorescent. Ndị a bụ ogige kemịkalụ na-enweta ìhè na mpaghara ultraviolet nke electromagnetic spectrum; ndị a na-atụgharị ọkụ na mpaghara acha anụnụ anụnụ site n'enyemaka nke fluorescence