blue flash

英語（米国） (en-US) 英語（イギリス） (en-GB)

名詞

(meteorology, astronomy) A very rare phenomenon observed in the morning or evening when the sun is crossing or immediately below the horizon, in which a momentary flash of blue light appears above the upper rim of the solar disk, caused by refraction of light in the atmosphere.

日本語の意味

太陽が水平線近くにある日の出または日の入りの際、大気中の光の屈折により、太陽の上縁付近に一瞬だけ現れる青い閃光現象。 / 気象学や天文学における非常に稀な現象で、太陽の位置が水平線を横切る時または直下にある時に観測される。

英語の意味

(meteorology, astronomy) A very rare phenomenon observed in the morning or evening when the sun is crossing or immediately below the horizon, in which a momentary flash of blue light appears above the upper rim of the solar disk, caused by refraction of light in the atmosphere.

このボタンはなに？

At dawn, the scientists were thrilled to observe a fleeting blue flash above the sun's upper rim as the star crossed the horizon.

夜明けに、研究者たちは太陽が地平線を越える際に、太陽の上縁に一瞬現れた青い閃光を観測して興奮した。

詳細

意味（1）

(meteorology, astronomy) A very rare phenomenon observed in the morning or evening when the sun is crossing or immediately below the horizon, in which a momentary flash of blue light appears above the upper rim of the solar disk, caused by refraction of light in the atmosphere.

意味（2）

(nuclear physics) A phenomenon sometimes observed when a criticality incident occurs in nuclear materials, inducing a discharge of radiation into the environment.

blue flashes （ plural ）