Question

Given the shape of a wavefront at any time, what does Huygens' principle allow to be determined?

Options

• The geometry of Saturn’s rings

• The shape of the wavefront at a later time

• The absence of every secondary wavelet

• The amplitude of every ray

Answer 1

The construction is not limited to a wavefront specified at [t=0]. Given its shape at any time, Huygens' principle determines the shape at a later time.