Dawn of the Modern Physics

Physics, HSSC-KPK Second Year. This chapter is split into 40 topics and has 1,080 practice questions. The topics covered are listed below, followed by 10 free sample questions from the chapter.

Topics in this chapter

1. de Broglie hypothesis and Davisson-Germer experiment 30 questions
2. Relativity of simultaneity and mass-energy equivalence 30 questions
3. Applications of photoelectric effect - photocell and solar cell 30 questions
4. Compton effect 30 questions
5. Reference frames and postulates of special relativity 30 questions
6. Photoelectric effect and Einstein's equation 30 questions
7. Length contraction, time dilation and mass increase 30 questions
8. Pair production and pair annihilation 30 questions
9. Black body radiation and Planck's quantum theory 30 questions
10. Wave-particle duality, electron microscope and uncertainty principle 30 questions
11. Frames of reference: examples and pseudo forces 20 questions
12. Einstein's postulates, check points and constancy of the speed of light 22 questions
13. Thought experiments and consequences of special relativity 24 questions
14. Space travel, GPS and the twin problem 21 questions
15. Thermal radiation and the black body: concepts and figures 23 questions
16. Planck's quantum hypothesis: statements and consequences 21 questions
17. Photoelectric experiment: apparatus, graphs and observations 22 questions
18. Photon theory: Einstein's explanation and failure of classical physics 21 questions
19. Compton scattering: derivation steps, figures and Example 18.7 21 questions
20. Pair production, matter waves and duality: further statements 23 questions
21. Electron microscope and uncertainty principle: further statements 22 questions
22. Assertion-reason questions on relativity 23 questions
23. Assertion-reason questions on quantum physics 28 questions
24. Comparisons and sequences in modern physics 22 questions
25. Overview of Unit 18, learning outcomes and exercise questions 30 questions
26. Length contraction numericals 30 questions
27. Time dilation numericals 30 questions
28. Relativistic mass increase numericals 30 questions
29. Relativistic energy and momentum numericals 30 questions
30. Mass-energy conversion numericals 27 questions
31. Wien's displacement law numericals 27 questions
32. Stefan-Boltzmann law numericals 30 questions
33. Photon energy and Planck's constant numericals 30 questions
34. Photoelectric effect numericals: kinetic energy and work function 30 questions
35. Photoelectric effect numericals: stopping potential and threshold 30 questions
36. Compton scattering numericals 29 questions
37. Pair production and annihilation numericals 25 questions
38. de Broglie wavelength numericals: moving particles 29 questions
39. de Broglie wavelength numericals: accelerated electrons 30 questions
40. Heisenberg uncertainty principle numericals 30 questions