Intensity = number of photons, frequency = energy of each photonतीव्रता = फोटॉनों की संख्या, आवृत्ति = प्रत्येक फोटॉन की ऊर्जाIntensity = number of photons, frequency = energy of each photon
NCERT Sec 11.6–11.7 · 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
- Dim violet light (मंद बैंगनी प्रकाश) — Few photons per second, each of energy hc/λ = 3.10 eV (> 2.75 eV), so a few electrons come out — instantly.
- Bright violet light (तीव्र बैंगनी प्रकाश) — More photons per second, same energy each: more electrons (bigger current) but the same Kmax = 3.10 − 2.75 = 0.35 eV.
- Bright red light (तीव्र लाल प्रकाश) — Each photon has only 1.91 eV < 2.75 eV. However bright, no electron is emitted (ν < ν0).
- Sodium plate (सोडियम प्लेट) — Work function 2.75 eV (a commonly quoted value); threshold wavelength about 451 nm.
- No emission (कोई उत्सर्जन नहीं) — Below the threshold frequency, intensity does not help.
Original diagram drawn by Simple Learning Hub, based on NCERT Sec 11.6–11.7. Report a mistake