Our journals are open-access, so authors make a commitment to publish an article as gold open access under a Creative Commons Attribution (CC-BY) license. This option requires an article publication charge (APC). Authors are required to pay the applicable charge as soon as the article is accepted via bank deposit/Remita/Flutterwave. The details of the payment would be included in the acceptance letter. Authors who wish to withdraw the publication of their article after payment of APC and before publication may do so by communicating with the editorial office at [email protected] / [email protected] / +234 13306 494 or visit Department of Physics, Faculty of Science, Federal University of Lafia. The refund would be processed within five days. There will be no refund for retraction or withdrawal of articles after the article has been published.