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Question
The characteristic length of entities in Superstring theory is approximately $10^{-35}\textrm{ m}$. (a) Find the energy in GeV of a photon of this wavelength. (b) Compare this with the average particle energy of $10^{19}\textrm{ GeV}$ needed for unification of forces.
1. $1\times 10^{20} \textrm{GeV}$
2. $10$
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