Title: I was playing around with fundamental constants and out popped 13.8 billion light years. What is going on?<p>the wavelength of an electron mass photon &#x2F; (2pi)
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the charge radius of a proton
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the black hole radius of a proton
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13.8 billion light years<p>((h &#x2F; (m_e * c * 2pi)) * (h &#x2F; (m_p * c * pi&#x2F;2)) &#x2F; (2G * m_p &#x2F; c^2))
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13.8 billion light years<p>https:&#x2F;&#x2F;www.wolframalpha.com&#x2F;input&#x2F;?i=%28h+%2F+%28m_e+<i>+c+</i>+2pi%29%29+<i>+%28h+%2F+%28m_p+</i>+c+<i>+pi%2F2%29%29+%2F+%282G+</i>+m_p+%2F+c%5E2%29+to+light+years&amp;assumption=%22UnitClash%22+-%3E+%7B%22G%22%2C+%7B%22GravitationalConstant%22%7D%7D&amp;assumption=%22UnitClash%22+-%3E+%7B%22m_e%22%2C+%7B%22ElectronMass%22%7D%7D&amp;assumption=%22UnitClash%22+-%3E+%7B%22c%22%2C+%7B%22SpeedOfLight%22%7D%7D&amp;assumption=%22UnitClash%22+-%3E+%7B%22h%22%2C+%7B%22PlanckConstant%22%7D%7D
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