This book is a simple introduction to the fundamentals of modern physics (theory of relativity, quantum mechanics), experimental procedures, and current unsolved mysteries of the universe.

Modern physics is the branch of physics that emerged in the late 19th and early 20th centuries, revolutionizing our understanding of the fundamental laws governing the universe at both the smallest and largest scales. It encompasses quantum mechanics, relativity, nuclear physics, particle physics, astrophysics, and cosmology. This book is aimed at undergraduate and graduate students, introducing them to the mysteries of modern physics. Throughout this book, we minimize the derivation of equations, allowing readers to develop intuitive understandings of these concepts. By shedding light on the unsolved mysteries of modern physics, we aim to reveal how the progress of experimental technology not only solves existing puzzles but also uncovers new ones.

Key Features:

• Accessible introduction to modern physics
• Equations kept to a minimum
• Gentle introduction to students to the boundaries of our knowledge
• Includes experimental methods and applications

Preface

Acknowledgements

Author biography

1 Introduction to the fundamental parts of modern physics

2 Recently solved mysteries

3 Unsolved mysteries in particle physics

4 Unsolved mysteries in astrophysics and cosmology

5 Conclusion

Appendix A: Boltzmann energy distribution and entropy

Appendix B: Energy state of hydrogen atoms

Appendix C: Measurement uncertainty

Appendix D: Energy eigenvalue in the harmonic potential

Appendix E: Transition between two or three states

Appendix F: Expansion of a travelling wave with spherical functions

Appendix G: Optoelectrical Sisyphus cooling