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A car parked in the sun with its windows closed gets terribly hot inside. This is due to

  • A.The heat emitted by the engine
  • B.The greenhouse effect
  • C.The good conducting power of the metal body
  • D.The double layered wind shield

Answer: B

This is the greenhouse effect.

Short-wavelength sunlight passes through the glass and is absorbed by the seats and dashboard, which then re-radiate at much longer infrared wavelengths. Glass is opaque to that infrared, so the heat is trapped, and the closed windows also prevent it escaping by convection.

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