Colour Stability & Consistency Quiz
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Questions and Answers

What does a black body do in terms of radiation?

  • Absorbs specific wavelengths of radiation
  • Emits all radiation at all wavelengths
  • Absorbs all radiation at all wavelengths (correct)
  • Reflects all radiation at specific wavelengths

    • What is the characteristic of a black body's emission when at a uniform temperature?

  • Has a characteristic frequency distribution (correct)
  • Changes rapidly with temperature
  • Remains constant regardless of temperature
  • Depends on the material of the black body

    • What is the primary factor that determines the emission color of a black body?

  • Material composition
  • Temperature (correct)
  • Surface area
  • Density

    • Why does a heated iron emit different colors over a range of temperatures?

    <p>Associated with its temperature changes (D)</p> Signup and view all the answers

    How is correlated color temperature (CCT) defined?

    <p>Proximity to the blackbody locus in chromaticity coordinates (A)</p> Signup and view all the answers

    What does the CCT represent about a light source?

    <p>Its color appearance relative to a black body (A)</p> Signup and view all the answers

    How can the CCT of a light source be determined?

    <p>By extending an isotemperature line from the blackbody locus to its chromaticity coordinates (C)</p> Signup and view all the answers

    Why do practical light sources with identical chromaticities have identical CCTs?

    <p>Because of their color stability (C)</p> Signup and view all the answers

    What is the significance of six isotemperature lines plotted in the CIE 1976 chromaticity diagram?

    <p>They help determine the CCT of a light source by extending a line from the blackbody locus to its chromaticity coordinates (D)</p> Signup and view all the answers

    What do different colors emitted by incandescent sources at varying temperatures signify?

    <p>Correspond to increasing temperature (D)</p> Signup and view all the answers

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