Schlieren imaging encompasses a family of optical methods that render invisible variations in fluid density by visualising the deflection of light rays as they traverse refractive index gradients.
The airborne spread of pathogens has assumed great importance in the public eye following the onset of the coronavirus disease 2019 (COVID-19 pandemic). In an interesting new research paper published ...
NASA researchers in California are using a modern version of a 150-year-old German photography technique to capture images of shock waves created by supersonic airplanes. Over the past five years ...
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