The Journey of a Photon
In short: Sunlight crosses the 150 million kilometres to Earth in about 8 minutes, but its energy first spends far longer working out of the Sun, handed on through absorption and re-emission rather than carried by one unchanged photon.
A 2:02 short film in the series “Journey of Light”, narrated by intellect_voice_01.
Sources used in this film: NASA, “Facts About Earth”; NASA Science (National Aeronautics and Space Administration), Framework for Heliophysics Education, “- NASA Science”; NASA Science (NASA Science Editorial Team), “Cosmic Distances - NASA Science”; Encyclopaedia Britannica, “Astronomical unit (AU, or au) | Definition, Conversion, & Facts | Britannica”; NASA Marshall Space Flight Center (Solar Physics Group), “NASA/Marshall Solar Physics”; NASA Science, “Sun: Facts - NASA Science”; U.S. Department of Energy, Office of Science (Nuclear Physics), “Understanding How the Sun Shines: From Triton Decay to Proton-Proton Fusion”; NASA Science (NASA HEAT, Heliophysics Education Activation Team), “HBY & Math #9: The Random Walk Problem - NASA Science”; Ohio University (Zach Meisel, ASTR4201 course notes, Fall 2020), “Quick notes on Light Propagation”; Princeton University, Department of Astrophysical Sciences (course notes for A403, 'Stellar timescales'), “timescales.pdf”; Swarthmore College (Astro 123 course reading; textbook chapter 9, 'Stellar Atmospheres'), “OC_randomwalk.pdf”; University of Maryland, Department of Astronomy (ASTR 601 lecture notes), “lecture04.dvi”; NASA (Sun-Earth Day 2007, 'Technology Through Time' series, archived at NASA Goddard Space Flight Center's SPDF), “NASA - Sun-Earth Day - Technology Through Time”; NASA Marshall Space Flight Center (MSFC) Solar Physics group, “NASA/Marshall Solar Physics”; NASA Goddard Space Flight Center (Imagine the Universe!, HEASARC), “Imagine the Universe!”; Biochemical Society / Portland Press (Essays in Biochemistry), hosted on PubMed Central by the U.S. National Library of Medicine, “Photosynthesis”; HyperPhysics (R Nave, Georgia State University), “Light Absorption for Photosynthesis”.
Sources used in this film
- NASA — Facts About Earth · View →
- NASA Science (National Aeronautics and Space Administration), Framework for Heliophysics Education — - NASA Science · View →
- NASA Science (NASA Science Editorial Team) — Cosmic Distances - NASA Science · View →
- Encyclopaedia Britannica — Astronomical unit (AU, or au) | Definition, Conversion, & Facts | Britannica · View →
- NASA Marshall Space Flight Center (Solar Physics Group) — NASA/Marshall Solar Physics · View →
- NASA Science — Sun: Facts - NASA Science · View →
- U.S. Department of Energy, Office of Science (Nuclear Physics) — Understanding How the Sun Shines: From Triton Decay to Proton-Proton Fusion · View →
- NASA Science (NASA HEAT, Heliophysics Education Activation Team) — HBY & Math #9: The Random Walk Problem - NASA Science · View →
- Ohio University (Zach Meisel, ASTR4201 course notes, Fall 2020) — Quick notes on Light Propagation · View →
- Princeton University, Department of Astrophysical Sciences (course notes for A403, 'Stellar timescales') — timescales.pdf · View →
- Swarthmore College (Astro 123 course reading; textbook chapter 9, 'Stellar Atmospheres') — OC_randomwalk.pdf · View →
- University of Maryland, Department of Astronomy (ASTR 601 lecture notes) — lecture04.dvi · View →
- NASA (Sun-Earth Day 2007, 'Technology Through Time' series, archived at NASA Goddard Space Flight Center's SPDF) — NASA - Sun-Earth Day - Technology Through Time · View →
- NASA Marshall Space Flight Center (MSFC) Solar Physics group — NASA/Marshall Solar Physics · View →
- NASA Goddard Space Flight Center (Imagine the Universe!, HEASARC) — Imagine the Universe! · View →
- Biochemical Society / Portland Press (Essays in Biochemistry), hosted on PubMed Central by the U.S. National Library of Medicine — Photosynthesis · View →
- HyperPhysics (R Nave, Georgia State University) — Light Absorption for Photosynthesis · View →
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Sources
- Summary by Intellect · source: NASA Science — Facts About Earth
- Also: NASA Science (National Aeronautics and Space Administration), Framework for Heliophysics Education: - NASA Science
- Also: Cosmic Distances - NASA Science
- Also: Astronomical unit (AU, or au) | Definition, Conversion, & Facts | Britannica
- Also: NASA Marshall Space Flight Center (Solar Physics Group): NASA/Marshall Solar Physics
- Also: Sun: Facts - NASA Science
- Also: U.S. Department of Energy, Office of Science (Nuclear Physics): Understanding How the Sun Shines: From Triton Decay to Proton-Proton Fusion
- Also: NASA Science (NASA HEAT, Heliophysics Education Activation Team): HBY & Math #9: The Random Walk Problem - NASA Science
- Also: Ohio University (Zach Meisel, ASTR4201 course notes, Fall 2020): Quick notes on Light Propagation
- Also: Princeton University, Department of Astrophysical Sciences (course notes for A403, 'Stellar timescales'): timescales.pdf
- Also: Swarthmore College (Astro 123 course reading; textbook chapter 9, 'Stellar Atmospheres'): OC_randomwalk.pdf
- Also: University of Maryland, Department of Astronomy (ASTR 601 lecture notes): lecture04.dvi
- Also: NASA (Sun-Earth Day 2007, 'Technology Through Time' series, archived at NASA Goddard Space Flight Center's SPDF): NASA - Sun-Earth Day - Technology Through Time
- Also: NASA Marshall Space Flight Center (MSFC) Solar Physics group: NASA/Marshall Solar Physics
- Also: NASA Goddard Space Flight Center (Imagine the Universe!, HEASARC): Imagine the Universe!
- Also: Biochemical Society / Portland Press (Essays in Biochemistry), hosted on PubMed Central by the U.S. National Library of : Photosynthesis
- Also: HyperPhysics (R Nave, Georgia State University): Light Absorption for Photosynthesis
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