Why are there no green stars?
As stars burn hotter and hotter, they go from looking red to orange to yellow to white to blue... But why are there no green stars?
Starlight looks basically like an ideal blackbody spectrum: a broad curve with the peak wavelength depending on the temperature.
However, our eyes see in a 3-dimensional color space by sampling the intensities of red, green, and blue light. Cool stars emit mostly in infrared, which we can't see, but within the visible spectrum, they emit much more red light than blue/green. Hot stars shine mostly in UV, but emit more blue than red/green.
But if the peak emission wavelength is green, then the broad blackbody curve is centered in the visible spectrum. So star emits roughly the same amount of red, green, and blue light, appearing white!
I make math and physics animations! Follow me on Twitter: https://twitter.com/bencbartlett
Other Videos By Ben Bartlett
2022-03-14 | Debussy - Clair de Lune |
2021-09-20 | Lorenz attractor with thousands of initial conditions |
2021-05-25 | Rachmaninoff - Moment Musicaux No. 4 |
2021-03-09 | Electromagnetic simulation at different timescales |
2021-01-20 | Teleportation-based photonic quantum computer animation |
2020-11-10 | Why are there no green stars? |
2020-08-13 | Essential singularity of exp(1/z) |
2020-07-30 | Transitions in hydrogen wavefunctions |
2020-07-24 | Fractional Fourier transform |
2020-07-07 | Orbital patterns with varying orbital radii |
2020-07-01 | Lorenz attractor from the point of view of the particle |
2020-06-09 | Chaotic dynamics in a Lorenz attractor |
2020-06-09 | Spherical harmonic oscillation in diamond |
2020-06-04 | CLEO 2020: Photonic Quantum Programmable Gate Arrays |
2017-12-06 | How laser cooling works |
2016-05-30 | Universal cellular automata in Infinifactory |