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In which of the following phenomena do heat waves travel along a straight line with the speed of light?

Options

  1. AThermal conduction
  2. BThermal convection
  3. CThermal radiation
  4. DBoth thermal conduction and radiation

Correct answer

C. Thermal radiation

Step-by-step solution

The energy emitted by a body, in the form of radiation on account of its temperature, is called thermal radiation. These radiations are heat radiations and travel along straight lines with the speed of light.

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