GATE Thermodynamics and Statistical Mechanics: black body radiation and Planck's distribution law – Previous Year Questions

1 GATE previous year questions on black body radiation and Planck's distribution law (Thermodynamics and Statistical Mechanics, Physics) with answers and explanations, from every paper.

1. GATE 2026 PH Q18 (1 mark, Multiple choice) – The formula for energy E of a photon gas at temperature T in a two-dimensional box at equilibrium with g 2d() denoting the density of states of…