Multiple Choice
An astronomer is measuring the brightness of a star using infrared light of wavelength 7.8 μm. This corresponds to a wavelength of:
A) 7.8 millionths of a meter.
B) 7.8 billionths of a meter.
C) 7.8 trillionths of a meter (where 1 trillion = 1 million million)
D) 780 millionths of a meter.
Correct Answer:
Verified
Correct Answer:
Verified
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