Below are three pictures of the disk of the Milky Way,taken in three different wavelength ranges. Put the three pictures in order from shortest to longest wavelength.
A)I,II,III
B)II,III,I
C)I,III,II
D)II,I,III
E)III,I,II

Question

Below are three pictures of the disk of the Milky Way,taken in three different wavelength ranges.  Put the three pictures in order from shortest to longest wavelength. 
A)I,II,III 
B)II,III,I 
C)I,III,II 
D)II,I,III 
E)III,I,II

Quizplus · Accepted Answer

The order of shortest to longest wavelength is: II (infrared), III (radio), I (visible light). Therefore, the pictures should be arranged in the order II, III, I, which matches choice B.

Below Are Three Pictures of the Disk of the Milky