Development of physical practicum tools to determine the refractive index through measurement of real depth and apparent depth

Abstract

This study aims to develop and determine the feasibility of a physics practicum tool to determine the refractive index of fluids through measurement of apparent depth and real depth. The product development method used in this study was Research and Development (R&D) with the ADDIE model. The results of this study, the refractive index of water is n = (1.3158112 ± 0.0000303) with a relative error of 1.07%, the refractive index for saltwater is n = (1.4476904 ± 0.0000387) with relative error by 1.37%, the refractive index for sugar water is n = (1.355680 ± 0,000145) with a relative error of 1.02%, and the refractive index for cooking oil is n = (1.4525593 ± 0.0000694) with a relative error of 1.36%. The results of the feasibility test of media experts, material experts and users for practicum tools and practicum guides were 90.69% which included in the Very Good category, 94.17% which was in the Very Good category, 90.62% which was in the Very Good category. Based on the results of these percentages, the practicum tools, and the practicum guides are declared to be suitable as learning media on Optics Geometry material, especially for the determination of the refractive index with real depth and apparent depth.