The figure shows a snapshot of circular waves emitted from a source with a 0.2 m

Question

The figure shows a snapshot of circular waves emitted from a source with a 0.2 m. Five positions, A-E, are indicated on various parts of the wave pattern. Answer the following questions about the wave at the time of the snapshot. 1. What is the distance between points B and C? 2. What is the distance between points D and E? 3. What is the phase difference between points B and E? 4. What is the phase difference between points A and E? 5. What is the phase difference between points C and D? 6. What is the phase difference between points B and C?

Explanation / Answer

given

lamda = 0.2 m

1) the distance between points B and C = lamda + lamda/2

= 0.2 + 0.2/2

= 0.3 m

2) the distance between points D and E = 4*lamda

= 4*0.2

= 0.8 m

3) phase diffrence between points B and E = 2*pi rad

4) phase diffrence between points B and E = 0

5) phase diffrence between points C and D = pi rad

6) phase diffrence between points B and C = 2*pi + pi

= 3*pi rad

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