====== Chapter 19: Dawn of Modern Physics ======
This is a ninth chapter of the book Physics 12 published by Punjab Curriculum and Textbook Board, Lahore, Pakistan.

After studying this chapter, the students will be able to:

  * Distinguish between inertial and non-inertial frames of references.
  * Describe the postulates of special theory of relativity and its results.
  * Understand the NAVASTAR navigation system.
  * Understand the concept of black body radiation.
  * Understand and describe how energy is distributed over the wavelength range for several values of source temperature.
  * Know Planck's assumptions.
  * Know the origin of quantum theory.
  * Show an appreciation of the particle nature of electromagnetic radiation.
  * Describe the phenomenon of photoelectric effect.
  * Explain photoelectric effect in terms of photon energy and work function.
  * Explain the function of photocell and describe its uses.
  * Describe Compton's effect.
  * Explain the phenomena of pair production and pair annihilation.
  * Describe de-Broglie's hypothesis of wave nature of particles.
  * Describe and interpret qualitatively the evidence provided by electron diffraction for the wave nature of particles.
  * Understand the working principle Of electron microscope.
  * Understand and describe uncertainty principle.


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| **Theory**: |{{ :fsc-pctb-12:notes:fsc-pctb-12-theory-ch19.pdf |Download PDF}} |
| **Question**: |{{ :fsc-pctb-12:notes:fsc-pctb-12-questions-ch19.pdf |Download PDF}} |
| **Numerical**: |{{ :fsc-pctb-12:notes:fsc-pctb-12-numericals-ch19.pdf |Download PDF}} |
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{{tag>FSc FSc_Part2 PCTB Notes}}