For example, blue light has a shorter wavelength than red light. White light is a mixture of many wavelengths. Sunlight has a big mix of many wavelengths of light. Indoor light sources, on the other ...

The last episode of "Guiding Light," the soap opera that has been on TV or radio for 72 years, airs at 3 p.m. today on CBS. We asked readers to send us their memories of the soap. In 1943, when I w… ...