Actinic radiation and Electromagnetic radiation

Actinic radiation noun - Electromagnetic radiation that can produce photochemical reactions.

Electromagnetic radiation and actinic radiation are semantically related. In some cases you can use "Electromagnetic radiation" instead a noun phrase "Actinic radiation".

Electromagnetic radiation noun - Radiation consisting of waves of energy associated with electric and magnetic fields resulting from the acceleration of an electric charge.

Actinic radiation and electromagnetic radiation are semantically related. Sometimes you can replace phrase "Actinic radiation" with "Electromagnetic radiation", this phrases are similar.