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SETI Searches Concentrate on the "Waterhole" in the Electromagnetic Spectrum

Question 3

Multiple Choice

SETI searches concentrate on the "waterhole" in the electromagnetic spectrum. This is the range of wavelengths:


A) 18 to 21 meters
B) 18 to 21 centimeters
C) 18 to 21 millimeters
D) 18 to 21 nanometers

Correct Answer:

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