Black bodies as an ideal model
Black bodies as an ideal model
Any object above absolute zero emits electromagnetic radiation because it has thermal energy. This temperature-based emission is called thermal radiation, and radiation laws use temperature in kelvin.
Step-by-step lessons on Edexcel A Level Physics Black-body radiation. Each one builds up to exam-style questions. Physics is one of the most mathematically demanding A Levels -- at least 40% of the marks across the three papers require maths skills at Level 2 (GCSE) standard or above, so build calculation and graph-handling fluency alongside the conceptual content from the start.