What is difference between electro-magnetic radiation & electro-magnetic wave ?

[shroff_rushi]

In radio frequency communication & other wireless communication systems we use electro-magnetic waves associated with antenna & transmission lines.
In spectroscopy we have UV-Visible electro-magnetic radiation. Generated by black body radiator tungsten lamp or halogen lamp.

we have electro-magnetic spectrum.

My question is 'What is difference between electro-magnetic radiation & electro-magnetic wave'..? Are they same ?? How to generate electro-magnetic waves with particular shaping ?

 

[Aussie Susan]

The electro-magnetic waves radiate from the source.
As for creating electro-magnetic waves with a particular shaping, I can think of two interpretations of this: one is to use an antenna to generate a radiation pattern of a given shape (e.g. a directional antenna) or the shape of the wave itself (e.g. amplitude modulation).
Susan

 

[c_mitra]

alpha and beta particles are not electromagnetic radiations; they are helium nucleus and electron respectively. Otherwise electromagnetic waves and electromagnetic radiation are the same thing.

 

[crutschow]

Electromagnet radiation consists of electromagnetic waves.