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Assume that the question is referring to electromagnetic radiation, traveling in vacuum.

Speed = 3 x 108 meters/sec

Frequency = (speed) / (wavelength) = (3 x 108) / (1,150 x 10-9) = 2.6087 x 1014 Hz

= 2.609 x 105 GHz (rounded)

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Q: What is the frequency of 1150 nanometers of radiation?
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