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Physics · Oct / Nov 2017 · Paper 12 · Question 18

5054Radiation

A heater is designed to radiate thermal energy. Which change to the design decreases the thermal energy emitted by radiation?

  1. Aa darker coloured surface
  2. Ba higher surface temperature
  3. Ca larger surface area
  4. Da shinier surface

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Correct answer: D. a shinier surface

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