A snapshot of two beaters oscillating in a ripple tank at the same frequency wit

Question

A snapshot of two beaters oscillating in a ripple tank at the same frequency with an amplitude of 2.0 cm is shown in the diagram. The circles represent wave crests. The amplitude of the wave is 2.0 cm. 2. [Ipt] What is the displacement at each of the labelled points, a, b, c? Enter your answers in this order. Answer 1 of3:0 Answer 2 of 3:0 Answer 3 of 3:0 Submit All Answers 3. [lpt] What is the fringe order, m, of the interference fringe that passes through point b? You have 2 tries Answer:0 Not yet correct, ONE try left!! Submit All Answers

Explanation / Answer

(A) at a, one wave its trough and other have trough.

resultant dispalcement = A1 + A2 = (+A) + (-A) = 0 ...Ans

at b. both wave have crest at this point.

A = A1 + A2 = (A) + (A) = 2 A = 2 x 2 cm

A = 4 cm ........Ans

at c, both have trough,

A = (-2) + (-2) = - 4 cm .....Ans

3. this is 2nd order.

m = 2

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