The solar energy reaching Earth travels a distance of ________ million kilometers through the vacuum of space.
A) 1
B) 8
C) 30
D) 150
E) 567
Question 2
In the electromagnetic spectrum, visible light occupies the band between 0.4 and 0.7 ________.
A) millibars
B) micrometers
C) Kelvins
D) meters
E) feet