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Consider the following statements: 1. Absorptivity depends on wave length of incident radiation waves 2. Emissivity is dependent on wave length of incident radiation waves Which of the above statements is/are correct?

Consider the following statements: 1. Absorptivity depends on wave length of incident radiation waves 2. Emissivity is dependent on wave length of incident radiation waves Which of the above statements is/are correct? Correct Answer Both 1 and 2

Explanation:

  • The absorptivity is the amount of radiation absorbed by a surface compared to what is absorbed by a black body.
  • Emissivity is defined as the ratio of the energy radiated from a material's surface to that radiated from a perfect emitter, known as a blackbody, at the same temperature and wavelength and under the same viewing conditions.
  • Both emissivity and absorptivity depend on the wavelength of incident radiation.
  • The emissivity at a certain wavelength is called spectral emissivity. This is applicable for the real surface.

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