Dual Nature of Matter and Radiation
Class 12 Physics Dual Nature of Matter and Radiation — photoelectric effect, work function, Einstein's photoelectric equation, photons, stopping potential, threshold frequency, de Broglie matter waves and the Davisson-Germer experiment with solved NCERT numericals.
Study by topic — one focused page each
Photoelectric Effect
Metals contain free electrons , yet these electrons do not spill out of the surface on their own. A minimum amount of energy is needed to pull an elec…
Start this topic → 2Einstein's Photoelectric Equation & Photons
To explain the photoelectric effect, Albert Einstein (1905) proposed that light is not a continuous wave when it exchanges energy with matter but come…
Start this topic → 3Matter Waves & de Broglie
If light, long thought to be a wave, also behaves as particles (photons), could matter — long thought to be particles — also behave as waves? In 1924 …
Start this topic →Chapter-wide tests
Online Test
18 MCQ • 15 min
IMO / Olympiad Practice
Olympiad level • 15 min
📝 Full Chapter Test (Download & Print)
40 marks • 90 min • with answer key