A user seeking a free online course in physics, particularly in quantum mechanics, received recommendations for two NPTEL courses. The first is by Prof. V. Balakrishnan, which dives directly into the complexities of quantum physics, assuming some prior knowledge of classical mechanics. The second course, by Prof. Manoj Harbola, starts from the basics of quantum theory, making it more suitable for beginners. Users are encouraged to explore both courses to determine which aligns better with their learning preferences. Additionally, there is an offer for a book recommendation that provides a less mathematically intensive introduction to the subject.