Four different blocks are heated to the same high temperature. Which block emits thermal radiation at the fastest rate?
| Colour and texture of surface | Surface area / cm2\text{cm}^2cm2 | |
|---|---|---|
| A | shiny silver | 40 |
| B | shiny silver | 160 |
| C | dull black | 40 |
| D | dull black | 160 |
Shiny silver surface with surface area 40 cm240\text{ cm}^240 cm2
Shiny silver surface with surface area 160 cm2160\text{ cm}^2160 cm2
Dull black surface with surface area 40 cm240\text{ cm}^240 cm2
Dull black surface with surface area 160 cm2160\text{ cm}^2160 cm2
99 exam-style questions on CIE IGCSE Physics 2.3.3a Thermal radiation. Each one has a worked solution and a mark scheme showing where the marks go.