shown following are several times in the history of the universe. imagine that you were able to watch a single photon that has been part of the cosmic microwave background since it first became present in the universe. rank these times from left to right based on the wavelength this photon would have at each time, from shortest to longest. 100 million years after the Big Bang
1.5 billion years after the Big Bang
1 million years after the Big Bang
500,000 years after the Big Bang
today