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Physics Facts

Ultraviolet Light

Ultraviolet light is a form of radiation which is not visible to the human eye. It's in an invisible part of the 'electromagnetic spectrum'. Radiated energy, or radiation, is given off by many ... Continue reading

Images from the EIT (Extreme-ultraviolet Imaging Telescope) instrument on the SOHO spacecraft.

Does Earth Have Its Own Neon Sign?

You might wonder what the Northern Lights and neon signs have in common. Actually, a lot! What makes luminous colors shimmer across the Northern sky? The answer is in the Sun. Charged particles ... Continue reading

Northern Lights

What Is Radiofrequency Energy (Rf)?

Radiofrequency (RF) energy is another name for radio waves. It is one form of electromagnetic energy that makes up the electromagnetic spectrum. Some of the other forms of energy in the ... Continue reading

The Sound of Turbulence

Do you ever watch the water tornado that forms in a draining bathtub? Woe unto any rubber ducky floating aimlessly in the vicinity; the water's force will pull it down into the tornado. The center of ... Continue reading

Smoke demonstrates the wakes caused by this jet.