Physics 0625 · IGCSE · Transfer of thermal energy

Transfer of thermal energy — practice question

The diagram depicts a black object X that is at constant temperature. The arrows show thermal radiation being absorbed and emitted at the surface. Object Y has the same constant temperature as X and is the same in every other respect except that its surface is white. Which row gives the correct comparison between object X and object Y?

  • Arate of absorption for X higher; rate of emission for X higher
  • Brate of absorption for X lower; rate of emission for X higher
  • Crate of absorption for X higher; rate of emission for X lower
  • Drate of absorption for X lower; rate of emission for X lower

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