This common misconceptions covers Common Misconceptions within Heat Transfer for GCSE Physics. Revise Heat Transfer in Energy for GCSE Physics with 14 exam-style questions and 11 flashcards. This is a high-frequency topic, so it is worth revising until the explanation feels precise and repeatable. It is section 12 of 17 in this topic. Use this common misconceptions to connect the idea to the wider topic before moving on to questions and flashcards.
Topic position
Section 12 of 17
Practice
14 questions
Recall
11 flashcards
⚠️ Common Misconceptions
Misconception 1: "Convection happens in all states of matter"
Convection only occurs in fluids (liquids and gases) where particles can move freely. In a solid, particles are fixed in their lattice positions and cannot flow. Convection in a solid is impossible. Heat in solids transfers only by conduction.
Misconception 2: "Radiation requires a medium to travel"
Unlike conduction and convection, radiation is an electromagnetic wave — it does not need particles to carry it. Radiation can travel through a complete vacuum. This is how the Sun's energy reaches Earth across 150 million km of empty space. Any object with a temperature above absolute zero emits radiation.
Misconception 3: "White surfaces reflect heat better than black surfaces"
For infrared (thermal) radiation, the colour of a surface matters less than its texture. A dull, matt black surface is the best absorber AND best emitter of infrared radiation. A shiny, silvered surface is the best reflector and worst emitter. A white surface reflects visible light well but does not necessarily reflect infrared well — the surface finish (matt vs shiny) matters more than colour for IR.