Black Body Radiation Activity Associated Objective: Use astronomical data and spectra to draw conclusions about astronomical objects, such as composition, temperature, velocity, and life cycle. Follow this link - https://phet.colorado.edu/sims/html/blackbody-spectrum/latest/blackbody-spectrum_en.html The curve in the simulator represents the amount of light emitted at each wavelength for an object of a given temperature. The horizontal axis gives the wavelength of light. Questions 1. Immediately, what do you notice about the blackbody curve? (Shape, amplitude, spectral components, etc.) The simulation starts you with the Sun's blackbody curve. You should observe this on the right side of the screen. 2. What color should the Sun appear based on its peak in the simulator? 3. Is this the color you see when you look at the Sun? Why do you think this is? 4. Looking at the scale on the right, how do you think the peak wavelength could be changed? Now, slide the temperature to 'Sirius A' and use the + and - signs to be able to see the entire blackbody curve. 5. How has the temperature changed? Why do you think this is? 6. How has the color changed? Why? How does this relate to its wavelength? 7. What part of the spectrum does Sirius A peak in? (You can check the "labels" box if you need a reminder of the Spectrum order) 8. Can we see this part of the spectrum? What color do you think Sirius A would appear to be to us