KIBU2023-02-152023-02-152022-07-29http://erepository.kibu.ac.ke/handle/123456789/7889SPH 121: Geometrics OpticsenAttribution-NonCommercial-ShareAlike 3.0 United Stateshttp://creativecommons.org/licenses/by-nc-sa/3.0/us/SPH 121: Geometrics OpticsGeometrics OpticsSPH 121Other