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Watch Video: Home Photography Ideas – Use a prism to take dazzling images A simple prism is designed to split the spectrum of white light into separate wavelengths. When white light passes through, we can see the visible spectrum of red, orange, yellow, green, blue, indigo, and violet. This stimulated the interest of the Romans …

A smiley-shaped antenna (left) is correctly identified by a new method of passively locating sources of radio waves (right). Credit: Aaron Diebold, Duke University A passive method of locating and characterizing radio waves could lead to cameras capable of capturing images using ambient radio waves. Electrical engineers at Duke University have developed an inexpensive method …