also: ぎゃくこう
When you take a photo in backlight, the subject can become dark.
In portraits, there is a technique to use backlighting to make the hair look beautiful.
backlight; illumination from behind
Standard kanji spelling. The reading ぎゃっこう is the most common pronunciation.
Alternate reading; less common than ぎゃっこう. May be encountered in older or formal contexts.
Compound of 逆 (reverse, opposite) and 光 (light). The reading ぎゃっこう is a contraction of ぎゃくこう, which is the regular on'yomi combination.