- #1
Phys12
- 351
- 42
In the following video (, diagram also given for reference), the professor says that if the graph peaks in a short wavelength, then the star is a hot star (or galaxy) and if it does so in a long wavelength, then it's a cold one. However, I fail to understand this. How does it happen that if a star emits more energy in shorter wavelengths, then it's a hot star and a cold one if it does so in longer wavelengths?
Thank you!