Four monochromatic light sources emit at the following frequencies:
1. 3.9×1014Hz
2. 4.3×1014Hz
3. 5.1×1014Hz
4. 6.7×1014Hz
Which ordering of the corresponding visible colors from longest to shortest wavelength is correct?
a) Blue, Yellow, Orange, Red
b) Red, Orange, Yellow, Blue
c) Red, Yellow, Orange, Blue
d) Orange, Red, Yellow, Blue