Blackbody Spectrum

Blackbody Spectrum Screenshot  Download  Embed
  • Blackbody
  • Planck's Law
  • Wien's Law
Flash Logo Original Sim and Translations


  • Blackbody
  • Planck's Law
  • Wien's Law
  • Electromagnetic Radiation
  • Quantum Mechanics
  • Astronomy


How does the blackbody spectrum of the sun compare to visible light? Learn about the blackbody spectrum of Sirius A, the sun, a light bulb, and the earth. Adjust the temperature to see the wavelength and intensity of the spectrum change. View the color of the peak of the spectral curve.

Sample Learning Goals

  • Describe what happens to the blackbody spectrum as you increase or decrease the temperature. What happens to the shape of the curve and the peak of this curve?
  • Describe the blackbody spectrum of a light bulb. Why do light bulbs get hot? Do they seem efficient?
  • Imagine that you see 2 hot, glowing objects--one is glowing orange and the other is glowing blue. Which one is hotter?
  • Find the relationship between the temperature and the wavelength at the peak of the curve.
Version 1.0.7

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Teacher-Submitted Activities

Visualization and Visual Illusions SIM Homework A gold star indicates high-quality, inquiry-based activities that follow the PhET design guidelines. This contribution was designed by PhET. Kathy Perkins, Carl Wieman UG-Intro HW Physics
Alignment of PhET sims with NGSS This contribution was designed by PhET. Trish Loeblein updated by Diana López MS Other Earth Science
PhET Sims Aligned to the Chemistry Curriculum This contribution was designed by PhET. Julia Chamberlain UG-Intro
Other Chemistry
How do PhET simulations fit in my middle school program? This contribution was designed by PhET. Sarah Borenstein MS Other Physics
Earth Science
Blackbody Spectrum & Lasers Simulations Homework This contribution was designed by PhET. Kathy Perkins, Carl Wieman HS
HW Physics
Blackbody Spectrum Simulation Homework This contribution was designed by PhET. Kathy Perkins, Carl Wieman UG-Adv
HW Physics
MS and HS TEK to Sim Alignment Elyse Zimmer HS
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Mapping of PhET and IBDP Physics Jaya Ramchandani HS Other Physics

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