Equation 139 · Part 2 · The Bend an Elevator Cannot Fake

Symbol h^2

\phi_{,zz}\,h^2 = \sqrt2\,\sigma_y

h^2

What this part means

The square of h: multiply h by itself.

$h^2$ is part of the quantity the equation computes from the expression on the right.

Full expressionSymbol h^2Article meaning

σ y . Setting signal equal to noise, $\phi_{,zz}$ \, $h^2$ = $\sqrt2$ \, $\sigma_y$ , gives

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.

These citations provide research context; check each source for the exact claim it supports.