Do radio waves penetrate solid matter
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By Colin Barras 31 July Light is what allows us to understand the world we live in. Our language reflects this: after groping in the dark, we see the light and understanding dawns. Yet light is one of those things that we don't tend to understand. If you were to zoom in on a ray of light, what would you see? Sure, light travels incredibly fast, but what is it that's doing the travelling? Many of us would struggle to explain.
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Radio Waves 'See' Through Walls
wave-particle duality, uncertainity principle
Uncertain Universe Electromagnetic Radiation a. The wavelength of the light determines its characteristics. For example, short wavelengths are high energy gamma-rays and x-rays, long wavelengths are radio waves. The whole range of wavelengths is called the electromagnetic spectrum.
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What is a ray of light made of?
Neither the radio waves nor the light waves are particularly good at penetrating into conductors, like metals. Light waves are good at penetrating glass, and I suppose the radio waves are too. Saltwater is more or less transparent to light waves but not to radio waves. On your first question, yes, light in the visible spectrum has more energy per photon than a radio wave. The penetration depth of electromagnetic radiation does not depend except in some unusual cases on how many photons there are.
You may click on any of the types of radiation for more detail about its particular type of interaction with matter. The different parts of the electromagnetic spectrum have very different effects upon interaction with matter. Starting with low frequency radio waves, the human body is quite transparent. You can listen to your portable radio inside your home since the waves pass freely through the walls of your house and even through the person beside you! As you move upward through microwaves and infrared to visible light , you absorb more and more strongly.
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