A very simple and color-observable homemade Raman spectroscope with easy preparation is introduced by simply adding low-cost components (a transmission diffraction grating sheet, a magnifying glass, a ...

In an effort to make absorption spectrophotometry available to high school chemistry and physics classes, we have designed an inexpensive visible light absorption spectrophotometer. The ...

For the past four minutes, Walter Lewin has been laboring at the chalkboard, bent on conveying a point—or rather, a series of small, swift points, so close together they resemble a perforation. The 76 ...