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Equation 122 · Part 1 · The Bend an Elevator Cannot Fake

Symbol h^4

h4h^4
h4h^4

What this part means

h4h^4 is a part of this expression. Its role is fixed by the surrounding article and by the operations shown in the formula.

Its job in the formula

h4h^4 is a part of this expression. Its role is fixed by the surrounding article and by the operations shown in the formula.

The passage around this formula

An exact analytic evaluation, not a simulation, fixes the scale this actually requires. Take three clocks stacked vertically at heights -h , 0 , and +h near Earth’s surface, giving two edges y1y_1 = ϕ(0)\phi(0)-ϕ(−h)\phi(-h) and y2y_2 = ϕ(h)\phi(h)-ϕ(0)\phi(0) . Their difference is an exact finite-difference identity up to a Taylor remainder of order h4h^4 :

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Learn the underlying idea

An exponent tells how a base is used in multiplication. In x³, x is the base and 3 is the exponent: x³ = x × x × x.

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Sources cited in the article section

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