2.3.3 Radiation
- Syllabus
- 0625–2026–2027
- Topic
- 2.3.3
- Level
- —
2.3.3.1—Thermal radiation is infrared
- Know: thermal radiation is infrared radiation and that all objects emit this radiation
2.3.3.2—Thermal energy transfer by thermal
- Know: thermal energy transfer by thermal radiation does not require a medium
2.3.3.3—Effect of surface colour (black or
- Describe the effect of surface colour (black or white) and texture (dull or shiny) on the emission, absorption and reflection of infrared radiation
2.3.3.4—For an object to be at a constant
- Know: for an object to be at a constant temperature it needs to transfer energy away from the object at the same rate that it receives energy
2.3.3.5—What happens to an object if the rate
- Know what happens to an object if the rate at which it receives energy is less or more than the rate at which it transfers energy away from the object
2.3.3.6—How the temperature of the Earth is
- Know how the temperature of the Earth is affected by factors controlling the balance between incoming radiation and radiation emitted from the Earth’s surface
2.3.3.7—Experiments to distinguish between
- Describe experiments to distinguish between good and bad emitters of infrared radiation
2.3.3.8—Experiments to distinguish between
- Describe experiments to distinguish between good and bad absorbers of infrared radiation
2.3.3.9—Rate of emission of radiation depends
- Describe how the rate of emission of radiation depends on the surface temperature and surface area of an object
Objective notes
9 learning objectivesConceptIGCSE Physics