1. 
   re-radiation
   radiation from a conductive or dielectric body excited by an incident radio wave, resulting in a wave superimposed upon the incident wave
   Found op http://www.electropedia.org/iev/iev.nsf/display?openform&ievref=712-02-06
   
   
2. 
   recombination radiation
   <physics> Radiation produced when a free electron in a plasma is captured by an ion. ... (09 Oct 1997) ...
   Found op http://www.mondofacto.com/facts/dictionary?recombination+radiation
   
   
3. 
   reflected global solar radiation
   radiation that results from reflection of the global solar radiation by the surface of the Earth and by any surface intercepting that radiation
   Found op http://www.electropedia.org/iev/iev.nsf/display?openform&ievref=845-09-85
   
   
4. 
   Reflected Infrared Radiation
   Form of electromagnetic radiation with a wavelength between 0.7 to 3.0 micrometers (µm).
   Found op http://www.physicalgeography.net/physgeoglos/r.html
   
   
5. 
   Reflected Radiation
   Sunlight that is reflected from surrounding trees, terrain or buildings onto a surface exposed to the sky.
   Found op http://solarexpert.com/Glossary.html
   
   
6. 
   relative biological effectiveness of radiation
   the ratio of the absorbed dose of a reference radiation to the absorbed dose of the radiation of interest, generally X-ray or gamma ray, that produces the same level of biological effect NOTE - The term should only be used in radiobiology.
   Found op http://www.electropedia.org/iev/iev.nsf/display?openform&ievref=881-17-03
   
   
7. 
   relict radiation
   (from the article `Cosmos`) The actual discovery of the relict radiation from the primeval fireball, however, occurred by accident. In experiments conducted in connection with ...
   Found op http://www.britannica.com/eb/a-z/r/30
   
   
8. 
   Reradiation
   In telecommunication, the term reradiation has the following meanings: Near-field effects of an AM antenna may extend out two miles (3 km) or more. Cellular and Microwave towers within this radius can reflect the AM signal out at a different frequency. This process results in interfering frequencie...
   Found op http://en.wikipedia.org/wiki/Reradiation
   
   
9. 
   residual radiation
   Unwanted remainder of the useful beam after it has fulfilled its purpose
   Found op http://www.electropedia.org/iev/iev.nsf/display?openform&ievref=881-03-13
   
   

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