What does radiation mean?

Looking for the meaning or definition of the word radiation? Here's what it means.

Noun
  1. The shooting forth of anything from a point or surface, like diverging rays of light.
  2. The process of radiating waves or particles.
  3. The transfer of energy via radiation (as opposed to convection or conduction).
  4. Radioactive energy.
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For example, the mesh could filter the thermal radiation from a heat source so that only the optimal wavelengths reach the device.
The radiation emitted is detected by a scintillation counter and the image recorded.
We are also exposed to naturally occurring radiation or background radiation.
As a result, the energy exchange between matter and radiation becomes less efficient.
It's almost twice as heavy as lead, so it's great for armour plating, radiation shielding, ballast in missiles and aircraft counterweights.
Use of radiation for medical examinations and tests is the largest manmade source of radiation exposure.

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