Purwaningsih, S., Falah, H.S., Lestari, N., Sitinjak, H. and Mousa, A. 2024. WAVELENGTH OF THE He-Ne LASER BY USING TWO TYPES OF DIAPHRAGM DIFFRACTION METHODS. Jurnal Ilmiah Ilmu Terapan Universitas Jambi. 8, 1 (May 2024), 231-239. DOI:https://doi.org/10.22437/jiituj.v8i1.32058.