The purpose of this study was to describe students' ability of multi-representation in solving physics problems on optical material and students' learning outcomes in Physics Department, Universitas Negeri Surabaya. This study is quantitative descriptive research. The sample of this research is one class of students in the physics education study program and one class of students in the physics study program who took program courses in the odd semester of 2021/2022. The research data are multi-representation abilities and learning outcomes of optical materials. The test instrument used is based on multi-representation, which has been validated theoretically and is declared valid. The results of the analysis show that students' multi-representation abilities that are quite good are verbal and visual representation abilities, each with a percentage, while the ability to very good representation is a mathematical representation and symbolic. There is no very significant difference between the multi-representation abilities of students in physics education study programs and students of physics study programs. It is hoped that in the future, the results of the study can become information and references for teachers and lecturers in carrying out physics learning on optical material.