放ほう射しゃ照しょう度ど

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Meanings

1

noun

irradiance

Technical term in physics and optics; the radiant flux received by a surface per unit area.

set free, release, fire

射shoot, shine into, onto

照illuminate, shine, compare

度degrees, occurrence, time

放ほう射しゃ束そく
放射束 (radiant flux) is the total power emitted, while 放射照度 is the power per unit area incident on a surface.

Compound of 放射 (radiation) + 照度 (illuminance). A modern technical term.