Irradiation

Japanese: イラジエーション
Irradiation
〘Noun〙 (irradiation) 1. When an object is strongly illuminated against a dark background, the reflected light seeps into the unlit areas, making the light-emitting object appear larger than it actually is. 2. In photography, when strong light hits film, the light scatters inside the photosensitive layer, exposing the surrounding areas. The result is a blur of light, making the image unclear. This is likely to occur when the object is overexposed. 3. In physics, chemistry, biology, medicine, etc., the act of irradiating a substance with light, radiation, neutron beams, etc.

Source: The Selected Edition of the Japanese Language Dictionary About the Selected Edition of the Japanese Language Dictionary Information

Japanese:
〘名〙 (irradiation)① 暗い背景で物を強く照らすと、反射光が光の当たらない部分までにじみ出て、発光体の大きさが実際よりも大きく見える現象。② 写真で、強い光がフィルムに当たった場合、その光が感光膜の内部で散乱し、まわりの部分まで感光させること。その結果は光のにじみとなって現われ、映像が不鮮明になる。露出オーバーのときに起こりやすい。③ 物理、化学、生物学、医学などで、光や放射線、中性子線などによって、物質を照射すること。

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