| 单词 | Planck length |
| 释义 | Planck length The length scale at which a classical description of gravity ceases to be valid, and quantum mechanics must be taken into account. It is given by Lp = v(Gℏ/c3 ), where G is the gravitational constant, ℏ is the rationalized Planck constant, and c is the speed of light. The value of the Planck length is of order 10-35 m (twenty orders of magnitude smaller than the size of a proton, 10-15 m) |
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