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International A LevelPhysicsEdexcelExam Questions5. Thermodynamics, Radiation, Oscillations & CosmologyBlack Body Radiation

Black Body Radiation (Edexcel International A Level Physics): Exam Questions

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Two stars, X and Y, behave as black body radiators. The graphs show how the intensity I of radiation emitted varies with wavelength λ for the two stars.

q10-wph15-05-june-2021-edexcel-int-as-and-a-level-phy

The stars are both viewed from the same distance.

Which of the following statements can be deduced from the two graphs?

  • Star X is brighter and has a higher surface temperature than star Y.

  • Star X is brighter and has a lower surface temperature than star Y.

  • Star X is dimmer and has a higher surface temperature than star Y.

  • Star X is dimmer and has a lower surface temperature than star Y.

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