Question

Which of these scenarios in a ripple tank would result in destructive interference?

two crests of the same amplitude meeting


two troughs meeting


crests of different amplitudes meeting


a crest and a trough meeting

Answer 1

I think it's B. two troughs meeting.

if it's wrong just let me know and I'll figure out the right answer
hope my answer helps!!!!!!

Answer 2

a crest and a trough meeting

Step-by-step explanation:

Interference is a phenomenon which occurs when two or more waves come together. Each wave will have a crest (positive amplitude) and a trough (negative amplitude).

If the magnitude of resultant wave’s amplitude is smaller than the original waves, then there is a destructive interference.

It happens if the path difference is integral multiples of half wavelength

Δφ = n (λ/2)

In this case amplitudes of the original waves will have opposite signs.

Since crests have positive amplitude and troughs have negative amplitude they will create a destructive interference

If the magnitude of resultant wave’s amplitude is larger than the original waves, then there is a constructive interference.

It happens if the path difference is integral multiples of the wavelength

Δφ = nλ

In this case amplitudes of the original waves will have same signs.