Sari, A., Dewi, U. and Setiawan, T. 2023. MEASUREMENT OF REFRACTIVE INDEX OF WATER IN COASTAL AREA USING He-Ne LASER AND HOLLOW PRISM. Jurnal Inovasi Pendidikan dan Sains. 4, 2 (Aug. 2023), 108-112. DOI:https://doi.org/10.51673/jips.v4i2.1618.