Wien Displacement law | Thermal properties of matter | Grade 11 | Physics | Khan Academy

Learn about Wien’s Displacement Law and how temperature affects the color of emitted radiation. Watch a real-life analogy, visual explanation with graphs, and see how we use this law to calculate the Sun’s surface temperature! 0:00 – Intro to Wien’s Displacement Law 0:16 – Iron rod and temperature-color relation 0:51 – What is a black body? 1:35 – Visual demo using prism and spectrum 2:46 – Energy vs wavelength graph 3:36 – Effect of increasing temperature on graph 4:19 – Inverse relation: $\lambda_m \propto \dfrac{1}{T}$ 5:03 – Wien’s law equation and constant 5:44 – Application: Finding Sun’s temperature 7:00 – Final answer and summary Khan Academy India is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We have videos and exercises that have been translated into multiple Indian languages, and 15 million people around the globe learn on Khan Academy every month. Support Us: https://india.khanacademy.org/donate Created by Chandan Ganotra