Things You Thought You Knew – Is Everything Light?
Summary
Neil deGrasse Tyson and Chuck Nice explore three interconnected topics: albedo, light pollution, and the electromagnetic spectrum. They reveal how a body's reflectivity influences its temperature and appearance, using the moon and Earth as examples, and discuss Leonardo da Vinci's early insights into "Earthshine." The conversation then shifts to the multifaceted issue of pollution, from visible light obscuring stars to radio wave interference and the new challenge of satellite streaks for advanced telescopes like the Vera Rubin. Finally, they unify all forms of radiation, from radio waves to gamma rays, as part of the same electromagnetic spectrum, highlighting their varying energy levels and effects.Episode description
How bright is the Earth from the moon? Neil deGrasse Tyson and Chuck Nice have fun with the sun’s reflectivity, discuss light pollution, and explore the electromagnetic light spectrum: how does sunscreen work?
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