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
Q49: 106/109 =
A)1054
B)1015
C)10-3
D)103
Q50: 106/106 =
A)1
B)10
C)0
D)1012
Q51: (9.0 × 105)/(1.5 × 103) =
A)13.5 ×
Q52: 2.5 × 104 × 2.5 × 10-4
Q53: A particular molecule has a diameter of
Q55: The distance from Earth to the star
Q56: The distance to the star τ Scorpii
Q57: The star
Q58: The star ? Puppis is about 750
Q59: What is the distance between Earth and
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