The electromagnetic spectrum, or EM spectrum ... at the same speed in the vacuum of space, the speed of light, or about 300 million meters per second (300,000 km/s). Each type of EM radiation ...

I must still have an old incident light meter lying around; I'll see how different my results are when I put its milky white dome in front of my phone camera. Color and spectrum are different ...

The sunlight that we see — aptly named visible light — falls into only a very narrow range of the spectrum, from about 400 to 750 nanometers (a nanometer is one-billionth of a meter ...

There is more to light than meets the eye, and it teaches us a lot about the universe. Parts of the electromagnetic spectrum invisible to human eyes reveal a vast amount of information about the ...

WiPry spectrum analyzer/RF power meter for iPad, iPhone, and iPod Touch. Oscium, www.oscium.com. Oscium, the company that developed an iOS oscilloscope, has added a spectrum analyzer/power meter for ...

In this International Year of Light, it is particularly appropriate to review the historical concept of what is light and the controversies surrounding the extent of the visible spectrum.

This is the first time a single lens has been used to focus the entire spectrum of light, including white light. According to the authors of the study, published in Nature Nanotechnology ...