An infrared ray is electromagnetic radiation.
Source: tatoeba (1971006)
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An infrared ray is electromagnetic radiation.
Source: tatoeba (1971006)
Sound needs matter to propagate through. However, cosmic noise and electromagnetic waves don't.
Source: tatoeba (3513071)
By looking at an object's electromagnetic spectrum, scientists can determine if an object is moving away from Earth or towards Earth.
Source: tatoeba (3957766)
Chandra records observations of the universe in the high-energy end of the electromagnetic spectrum.
Source: tatoeba (3958348)
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