What Does Your Light Eat?

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In 2009, a team of Japanese researchers led by Masaki Kobayashi from the Tohoku Institute of Technology discovered that the human body emits visible light in small quantities that vary during the day.⁰ The amount of light emitted follows a 24-hour cycle, at its highest in late afternoon and lowest late at night, and the brightest light is emitted from the cheeks, forehead, and neck.³ The diurnal changes in photon emission might be linked to changes in energy metabolism.² The intensity of the light emitted by the body is 1000 times lower than the sensitivity of our naked eyes.⁴ The human body emits infrared radiation, with a peak wavelength of about 9.35 micrometers.¹

petapixel.com quora.com 1 journals.plos.org 2 theguardian.com 3 ncbi.nlm.nih.gov 4

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