Physics · Oct / Nov 2025 · Paper 12 · Question 24

Energy can be transferred by thermal radiation. Four surfaces have different colours and textures. The surfaces are at equal temperatures and have equal surface areas. Which surface transfers energy by thermal radiation at the fastest rate?

1. Ablack and dull surface
2. Bblack and shiny surface
3. Cwhite and dull surface
4. Dwhite and shiny surface

As printed in the paper