PadhoNaby JEE Master
  • Home
  • Learn
  • Plan & Focus
  • Community
  • Pricing
  • Play & Compete
  • Free Resources
Log inJoin Free
PadhoNaby JEE Master

Ask. Share. Learn. Grow Together. India's all-in-one community for JEE Main & JEE Advanced aspirants.

Explore

  • Learn
  • Plan & Focus
  • Community
  • Play & Compete
  • Free Resources

Resources

  • JEE Main PYQs
  • JEE Advanced PYQs
  • Formula Sheets
  • NCERT Mapping
  • Mock Analysis

Support

  • Help Center
  • Privacy Policy
  • Terms of Use
  • Contact Us

© 2026 PadhoNa. All rights reserved.

Formula Sheets / Physics

Chapter 28

Dual Nature of Matter

Revise with flashcards Download this chapter (PDF) All Physics formulas (PDF)
Photoelectric effectde Broglie wavelength

Photoelectric effect

  • Photon

    E=hν=λhc​,E(eV)≈λ(nm)1240​,p=λh​

  • Einstein's equation

    Kmax​=hν−ϕ=eV0​,ϕ=hν0​
  • stopping potential depends on frequency, not intensity; current∝intensity

de Broglie wavelength

  • λ=ph​=mvh​=2mK​h​

  • Electron through V volts

    λ=2meV​h​≈V​12.27​ Å

  • Thermal particle

    λ=3mkB​T​h​
Wave OpticsAtomic Physics