de Broglie's Relation — Predicted 2026

AI-Predicted Question Angles for UPSC 2026

Based on trend analysis, current affairs, and recurring themes in de Broglie's Relation.

Comparative Wavelengths for Different Particles with Same Kinetic Energy

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This is a classic NEET question type that tests the understanding of the inverse relationship between de Broglie wavelength and the square root of mass when kinetic energy is constant ($\lambda = h/\sqrt{2mE_k}$). Students are often asked to rank or find the ratio of wavelengths for electrons, protons, neutrons, and alpha particles. This requires knowing their relative masses and applying the proportionality correctly. It's a quick check of conceptual clarity and formula application.

De Broglie Wavelength of an Electron Accelerated by a Potential Difference

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The formula $\lambda = h/\sqrt{2me V}$ is a direct application of de Broglie's relation to a common experimental setup. Questions involving this formula are frequently asked, requiring students to substitute values for Planck's constant, electron mass, elementary charge, and the given voltage. These questions test numerical accuracy and unit consistency, making them ideal for objective exams like NEET.

Conceptual Understanding of Wave-Particle Duality and Macroscopic Objects

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While numerical problems are common, NEET also includes conceptual questions. A recurring theme is why macroscopic objects do not exhibit observable wave properties. This tests the student's understanding of the magnitude of Planck's constant and how it makes the de Broglie wavelength negligibly small for objects with significant mass and momentum. Such questions assess deeper conceptual grasp beyond mere formula application.