Planck's Blackbody Radiation

5 Questions

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Radiation Quizzes & Trivia

Use the graphic to the left to help solve theses problems


Questions and Answers
  • 1. 
    What is a black body?
    • A. 

      A theoretical object that absorbs 100% of light incident upon it and then reradiates it

    • B. 

      The cosmic microwave background radiation

    • C. 

      A greater intensity of light incident on a metal resulted in more electrons being emitted from the metal

    • D. 

      A photon is emitted when the electron jumps down in energy

  • 2. 
    The amount of blue light (475 nm) in this spectra is most closely
    • A. 

      .45 nW/m^2 μm

    • B. 

      50 nW/m^2 μm

    • C. 

      1.0 nW/m^2 μm

    • D. 

      6 nW/m^2 μm

    • E. 

      20 nW/m^2 μm

  • 3. 
    The wavelength that produces the maximum amount of light (λmax) in this spectra is most closely:
    • A. 

      .45 μm

    • B. 

      50 nW/m^2 μm

    • C. 

      .7 μm

    • D. 

      1 μm

    • E. 

      2 μm

  • 4. 
    Let Fλ(B) denote the amount of blue light (475 nm) and Fλ(R) denote the amount of red light (650 nm). Which of the following is correct?
    • A. 

      Fλ(B) < Fλ(R)

    • B. 

      Fλ(B) = Fλ(R)

    • C. 

      Fλ(B) > Fλ(R)

  • 5. 
    The ratio of the amount of blue light to the amount of red light, Fλ(B)/Fλ(R), is most closely:
    • A. 

      .2

    • B. 

      .6

    • C. 

      1.5

    • D. 

      6

    • E. 

      10