Answer
110 m
Work Step by Step
Find the angular resolution using equation 25–7.
$$\theta=\frac{1.22\lambda}{D}$$
The smallest feature resolvable, L, is that angle multiplied by the distance to the moon from the satellite, r.
$$L=r \theta=\frac{1.22 r \lambda}{D}$$
$$=1.22 \frac{(3.84\times10^8m)(550\times10^{-9}m)}{2.4m}$$
$$ = 107.4m\approx110m$$
