How big is a de Broglie wavelength?दे ब्रॉग्ली तरंगदैर्ध्य कितनी बड़ी होती है?How big is a de Broglie wavelength?
NCERT Sec 11.8, Ex 11.3 · 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
- Ball (Example 11.3 b) (गेंद (उदाहरण 11.3 b)) — p = 4.50 kg m/s → λ = h/p = 1.47 × 10⁻³⁴ m: far too small to detect, so everyday objects show no wave behaviour.
- Electron (Example 11.3 a) (इलेक्ट्रॉन (उदाहरण 11.3 a)) — p = 4.92 × 10⁻²⁴ kg m/s → λ = 0.135 nm: comparable to X-ray wavelengths and atomic spacings in crystals, so it is measurable.
- Size of a proton (प्रोटॉन का आकार) — About 10⁻¹⁵ m. The ball’s λ is about 10⁻¹⁹ of this.
- Size of an atom (परमाणु का आकार) — About 10⁻¹⁰ m (0.1 nm).
- X-ray wavelengths (X-किरण तरंगदैर्ध्य) — Roughly 10⁻¹¹ m to 10⁻⁸ m.
- Visible light (दृश्य प्रकाश) — About 400–700 nm: thousands of times longer than the electron’s λ.
- Logarithmic length scale (लघुगणकीय लंबाई पैमाना) — Each tick is 10⁵ times the previous one.
Original diagram drawn by Simple Learning Hub, based on NCERT Sec 11.8, Ex 11.3. Report a mistake