KIBU2022-03-082022-03-082021-07-13http://erepository.kibu.ac.ke/handle/123456789/4490SPH 121:Geometric opticsenAttribution-NonCommercial-ShareAlike 3.0 United Stateshttp://creativecommons.org/licenses/by-nc-sa/3.0/us/SPH 121:Geometric opticsGeometric opticsSPH 121Other