The Double Image Experiment Teaches Reflection and Refraction
A flat thick glass with black paper behind acts as a mirror, producing two reflected images from the top and bottom faces. Light from a flashlight reflects and refracts through the glass, bending at the density boundary, illustrating basic optics. The related science collection Science For You in Science Circus surveys similar experiments.
Moscow Subway: Clean, Cheap, Expanding Beneath City
AP reports Moscow’s growing subway network spreading under the city with new lines linking central districts to sprawling suburbs. Officials tout high daily ridership, 3.5 million, and rapid trains, while details on construction costs and depths remain undisclosed amid air raid shelter concerns.
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