flash-blue

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Definition of flash-blue in English English dictionary

blue flash
A phenomenon sometimes observed when a criticality incident occurs in nuclear materials, inducing a discharge of radiation into the environment
blue flash
A very rare phenomenon observed in 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
flash-blue
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