Einstein's equation: hν = φ0 + Kmaxआइंस्टाइन का समीकरण: hν = φ0 + KmaxEinstein's equation: hν = φ0 + Kmax

NCERT Sec 11.6 · Class 12 Physics · Chapter 11 · interactive diagram

Parts and what they mean

• Photon energy hν (फोटॉन ऊर्जा hν) — One photon gives all its energy hν to one electron.
• Work function φ0 (कार्य फलन φ0) — Part of hν used just to get out of the metal.
• Maximum kinetic energy Kmax (अधिकतम गतिज ऊर्जा Kmax) — What is left: Kmax = hν − φ0. More tightly bound electrons come out with less.
• Escape level (पलायन स्तर) — An electron must be raised at least to this level to leave the metal.
• Metal surface (धातु पृष्ठ) — The most energetic free electrons sit φ0 below the escape level.
• Photoelectron (प्रकाश-इलेक्ट्रॉन) — Leaves with kinetic energy up to Kmax = eV0.
• Not enough energy (ऊर्जा अपर्याप्त) — If hν < φ0 (ν < ν0) the electron cannot escape. More intense light only means more such photons — still no emission.

Original diagram drawn by Simple Learning Hub, based on NCERT Sec 11.6. Report a mistake