Thinking Physics presents a conceptual treatment of physics suitable for high school level. The material included herein is expected to largely/entirely meet the needs of students from Classes VIII to X of various boards, including CBSE and ICSE. It would also be useful for students preparing for examinations such as NTSE or Olympiads. It should serve as a (pre-calculus) physics primer for students taking up science at senior school level. More importantly, it is expected to encourage students into thinking physics and developing a logical scientific temper