New and motivating video for physics students to gain problem solving experience in Modern Physics, which include refraction, diffraction, nuclear reactions, the atom of hydrogen, the photoelectric effect, the wave-particle duality, and other important topics in the high school physics program, including AP Physics 2. This video shows 90 original and carefully designed problems in high quality MP4 video format, which can provide about 4½ hours of problem-solving practice. After each exercise is