Why can't we see back the whole way to the Big Bang?
a) Radiation is blueshifted out of the visible range.
b) It would take too long for light to travel that far.
c) Our telescopes could never be powerful enough.
d) The radiation scatters off matter frequently so the Universe is opaque.
e) Not enough photons were produced.
Ans: d) The radiation scatters off matter frequently so the Universe is opaque.
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