University Physics Volume 3 is a free Android app designed for students studying calculus-based physics courses. The app is developed by RK Technologies and is available for download on the Google Play Store. This app is the third volume of a three-part series, with the first two volumes covering mechanics, sound, oscillations, waves, thermodynamics, electricity, and magnetism.

The app's main focus is on optics and modern physics, with a strong emphasis on connecting theory and application to make physics concepts more accessible to students while maintaining the mathematical rigor inherent in the subject. The app contains multiple-choice questions, essay questions, and solutions to help students master the concepts.

The app's content is divided into two units, with the first unit covering optics and the second unit covering modern physics. The optics unit covers topics such as the nature of light, reflection, refraction, interference, and diffraction. The modern physics unit covers topics such as relativity, photons, matter waves, quantum mechanics, atomic structure, condensed matter physics, nuclear physics, and particle physics.

Overall, University Physics Volume 3 is an excellent app for students studying calculus-based physics courses. The app's content is relevant, accurate, and well-organized, making it easy for students to learn and master the concepts.