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Equation 51 · Part 1 · A Horizon Is a Toll Booth, Not a Loophole

Symbol Δ t

Δt=Δτ/f\Delta t = \Delta\tau/\sqrt f
Δt\Delta t

What this part means

Δ t is part of the quantity the equation computes from the expression on the right.

Its job in the formula

Δ t is part of the quantity the equation computes from the expression on the right.

The passage around this formula

​ E 0 ′ ​ (the amount of energy it would cost a distant experimenter, at infinity, to deliver that same physical resource down to radius r ), and integrate over the corresponding coordinate interval Δ\Delta t = Δ\Deltaτ\tau/f\sqrt f :

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Learn the underlying idea

A variable is a named place for a value. Its letter is a local label: x can mean position in one formula and a data point in another.

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