The figure shows the circular wave fronts emitted by two wave sources.
Part A. Give the distances from points P, Q and R to the point 1 in indicated order as multiples of λλ.
Part B. Give the distances from points P, Q and R to the point 2 in indicated order as multiples of λλ.
Part C. Give the propagation difference at points P, Q and R in indicated order as multiples of λλ.
Part D. Indicate whether the interference at the point P is constructive or destructive.
Part E. Indicate whether the interference at the point Q is constructive or destructive.
Part F. Indicate whether the interference at the point R is constructive or destructive.

The figure shows the circular wave fronts emitted by two wave sources Part A Give the distances from points P Q and R to the point 1 in indicated order as multi class=