Work function φ0 — energy pictureकार्य फलन φ0 — ऊर्जा चित्रWork function φ0 — energy picture
NCERT Sec 11.2 · Class 12 Physics · Chapter 11 · interactive diagram
Read Chapter 11 with this diagramइस डायग्राम के साथ अध्याय 11 पढ़ेंIs diagram ke saath Ch 11 padhiyeAll Physics diagramsसभी भौतिकी डायग्रामSaare Physics diagrams
Parts and what they mean
- Inside the metal (धातु के भीतर) — Free electrons move about inside, but the positive ions pull them back if they try to leave.
- Free electrons (different energies) (मुक्त इलेक्ट्रॉन (विभिन्न ऊर्जाएँ)) — Like molecules in a gas, free electrons do not all have the same energy; they have an energy distribution.
- Most energetic free electrons (सर्वाधिक ऊर्जा वाले मुक्त इलेक्ट्रॉन) — These need the least extra energy to escape — exactly φ0.
- Electron at rest just outside (ठीक बाहर विराम में इलेक्ट्रॉन) — Energy level of an electron that has just escaped with zero kinetic energy.
- Outside (vacuum) (बाहर (निर्वात)) — Region outside the metal surface.
- Work function φ0 (कार्य फलन φ0) — Minimum energy an electron needs to escape from the metal surface. Measured in eV; depends on the metal and its surface.
- Deeper electron (गहरा इलेक्ट्रॉन) — A lower-energy electron needs more than φ0 to come out; φ0 is the least energy (for the most energetic electrons).
Original diagram drawn by Simple Learning Hub, based on NCERT Sec 11.2. Report a mistake