THE PRACTICE STUDIO
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PRACTICE / Thermal radiation
A hotter surface radiates much more
A surface keeps the same area and emissivity while its temperature rises from 300 K to 600 K.
Find the ratio of its final emitted thermal power to its initial emitted power.
Organize the givens & assumptions
- T₁ = 300 K
- T₂ = 600 K
- A and ε fixed
Same emitting area and emissivity; total emitted power, not net exchange with surroundings; temperatures in kelvin.
- A
- B
- C
- D
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