In what season of the year is the actinic power of light the greatest?
But the figure passed beyond the actinic glare and vanished.
They have power to cause chemical changes, hence are known as the chemical or actinic rays.
Because of the actinic, or chemical power of the rays of the sun.
Simply the darkening of preparations of silver, by the actinic rays.
Because of the actinic powers that accompany the solar light.
Then, three years ago, Moonbase had vanished in a flash of actinic light, leaving only a new minor crater in the crust of Luna.
The so-called vital functions of animals and plants are also greatly influenced by the actinic or chemical rays.
If you recall, we spoke about the actinic rays which cause the chemical changes on the photographic plate.
The bleaching power of light depends on its actinic or chemical rays, which, like chlorine, appear to act as an oxidising agent.
actinic ac·tin·ic (āk-tĭn'ĭk)
Of or relating to the chemically active rays of the electromagnetic spectrum.