3.3.33

Temperature & Black Bodies

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Temperature and Black Bodies

All bodies (objects) emit radiation. The temperature of a body (object) is linked to the intensity (rate) and wavelength of the emitted radiation. Black bodies are perfect absorbers and emitters of radiation - they never reflect or transmit radiation.

All bodies (objects) emit radiation. The temperature of a body affects the intensity (rate)and the type of radiation. Black bodies are perfect at absorbing and emitting radiation. They do not reflect or transmit radiation.

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Constant temperature

  • An object at a steady temperature absorbs radiation at the same rate it emits radiation.
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Changing temperature

  • Heat moves from a hotter area to a colder area.

    • Radiators work because of this principle.
  • When an object's internal temperature is higher than its surroundings, it emits radiation faster than if it were in a warmer environment.

Jump to other topics

1Biology

1.1Cells, Tissues & Organs

1.2Reproduction & Variation

1.3Ecological Relationships & Classification

1.4Digestion & Nutrition

1.5Plants & Photosynthesis

1.6Biological Systems & Processes

2Chemistry

2.1Particles

2.2Chemical Reactions

2.3Atoms, Elements, Compounds

2.4The Periodic Table

2.5Materials & the Earth

2.6Reactivity

2.7Energetics

2.8Properties of Materials

3Physics

3.1Energy

3.2Forces & Motion

3.3Waves

3.4Electricity & Magnetism

3.5Matter

3.6Space Physics

4Disciplinary Knowledge

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