The condition for destructive interference is path difference should be equal to:

• A. Odd integral multiple of wavelength
• B. Integral multiple of wavelength
• C. Odd integral multiple of half wavelength
• D. Integral multiple of half wavelength

Destructive interference occurs when two waves meet and cancel each other out. This happens when the path difference between the waves is such that they are out of phase. The correct condition for destructive interference is:

Path Difference Requirement

The path difference should be equal to:

• Odd integral multiple of half wavelength (Option C)

This means that if one wave travels a distance that is an odd multiple of half the wavelength more than the other, they will interfere destructively, resulting in a reduction or cancellation of the overall wave amplitude.