Imaging and Signalling

Question 1

Formula for curvature

Answer 1

1/r
As r tends to infinity, curvature tends towards 0

Question 2

Distance and curvature relationship

Answer 2

As the distance from the source increases the curvature for the wave-fronts decreases

Question 3

Plane wave fronts

Answer 3

Wave fronts from a very distant source that don’t appear to curve at all