All the electromagnetic radiation and subatomic particles radiated from the Sun, especially that part that reaches the Earth(noun)
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Use "solar radiation" in a sentence
"Tom had installed his invention on top of the great plane and also a highly sensitive thermopile to record any effect of solar radiation on the liquid oxygen."
""As soon as I've checked the solar radiation effect on my rocket-fuel kicker,""
"Coatings on glass, or shading devices, prevent heat-causing solar radiation from entering buildings."