WAEC Physics 2025 Objective — Question 30
Question 30 of 51 from the West African Examinations Council (WAEC) Physics 2025 Objective paper, with the correct answer and a full explanation.
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Two waves will interfere destructively if the path difference between the waves is
- A. One wavelength
- B. One-half wavelengthCorrect
- C. One-quarter wavelength
- D. One-eighth wavelength
Explanation
Destructive interference occurs at path differences of (n+½)λ; the minimum condition (n=0) gives a path difference of λ/2 (half a wavelength).
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