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Whether a beam of light passes through an object often depends on the material of the object and the properties of the light, such as its frequency, color, and polarization. These properties can be assigned to individual photons, but some characteristics of light emerge only collectively, through quantum correlations between many photons. Developing materials that
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You have full access to this article through your institution. Hello Nature Readers, would you like to receive this report in your inbox for free every day? Register here. Computer scientist Pan Hui with a digital teaching avatar used at the Hong Kong University of Science and Technology in Guangzhou.Credit: Yawei Zhao From assisting in
Receive the daily Popular Science newsletter💡 Breakthroughs, discoveries and DIY tips delivered six days a week. By registering, you confirm that you are 16 years of age or older, you will receive newsletters and promotional content, you agree to our Terms of Use, and you acknowledge the data practices in our Privacy Policy. You can