The electromagnetic spectrum describes the range of electromagnetic waves ranging from visible light to the gamma rays. It is an essential aspect of science, and knowing this area of the universe is essential. I
Parts of the electromagnetic spectrum invisible to human eyes reveal a vast amount of information about the universe, but it took a long time for astronomers to learn how to view it. For thousands of years, humans were looking up at the star-studded night sky using just their eyes sensitive...
In the physics classroom, content based on superheroes can be used in support of learning materials on topics such as optics, advanced materials, kinematics, and the electromagnetic (EM) spectrum. Studies have highlighted several student preconceptions with regards to different radiation types. For ...
On the electromagnetic spectrum of non-visual light are (as mentioned above) the infrared wavelengths. Devices capable of picking up these wavelengths permit users to see in the dark. For example, if the enemy is using night-vision goggles, you’ll stand out like a sore thumb if you’re w...
Electromagnetic (EM) radiation, on the other hand, has no mass and travels in waves. EM radiation can range from very low energy to very high energy, and we call this span the electromagnetic spectrum. Within the EM spectrum, there are two types of radiation -- ionizing and non-ionizing....
retina: light-sensitive lining of the eye rod: specialized photoreceptor that works well in low light conditions trough: lowest point of a wave visible spectrum: portion of the electromagnetic spectrum that we can see wavelength: length of a wave from one peak to the next peakCandela...
Of course, further along the electromagnetic spectrum, security cameras and nanny cams can already track individuals with ease. “You’ve got to remember: the context you get out of the camera is just crazy,” says Taj Manku, CEO of the Wi-Fi sensing company Cognitive Systems. “You see ...
This is less than optimum when you want to connect cellphones, tablets and such to the Internet. However, adding an access point to the expanded cabling puts a wireless extender or router closer to mobile devices throughout the house.
(NIFS), part of the Gemini North telescope located on Mauna Kea on the island of Hawaii. The NIFS creates 3D images based on waves in the near-infrared region of the electromagnetic spectrum. This technology has not only allowed us to determine the smelly nature of Uranus, but other ...
The power in an electric current is equal to the current times the voltage (watts = volts x amps is one way to remember this), so you can see the power in the secondary coil is theoretically the same as the power in the primary coil. (In reality, there is some loss of power ...