Asked by tara

6 truths and a lie about interference waves

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Answered by GPT-5 mini AI
1) If two equal-amplitude coherent waves meet perfectly in phase, their amplitudes add and the resultant amplitude is twice that of each wave.

2) Destructive interference occurs when two waves meet exactly out of phase by π (180°), which can produce complete cancellation for equal amplitudes.

3) A stable interference pattern requires coherence — a fixed phase relationship between the interfering waves.

4) The intensity of an interference result is proportional to the square of the resultant amplitude, so constructive interference can give much higher intensity than each individual wave.

5) A path difference equal to an integer multiple of the wavelength produces constructive interference (for waves in the same medium and with no extra phase shifts).

6) Interference effects are unique to light waves and do not occur for other kinds of waves.

7) In thin-film interference, phase shifts on reflection can change whether a given geometric path difference produces constructive or destructive interference.

Want to guess which statement is the lie, or shall I point it out?