2.3.3 — Radiation

Core

2.3.3.1 — Know that thermal radiation is infrared radiation and that all objects emit it
2.3.3.2 — Know that thermal energy transfer by radiation does not require a medium
2.3.3.3 — Describe experiments to distinguish good and bad emitters of infrared radiation
2.3.3.4 — Describe experiments to distinguish good and bad absorbers of infrared radiation

2.3.3.5 — Describe how emission rate depends on surface temperature and area
2.3.3.6 — Describe how surface colour (black/white) and texture (dull/shiny) affect emission, absorption and reflection of IR radiation
2.3.3.7 — Know that an object stays at constant temperature when energy received equals energy emitted
2.3.3.8 — Know what happens when energy received is more or less than energy emitted
2.3.3.9 — Know how Earth’s temperature is affected by balance between incoming and outgoing radiation