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What is neccessory condition for path difference between two waves that interference 1 construction 2destruction?
Wiki User
∙ 11y ago
1). Constructive interference:
Refraction only . . . any even number of half-wavelengths
E&M wave with a reflection . . any odd number of half-wavelengths
2). Destructive interference:
Refraction only . . . any odd number of half-wavelengths
E&M wave with a reflection . . any even number of half-wavelengths
(Electromagnetic waves undergo a 180° phase shift during reflection, so
a reflected wave appears as if it has been advanced/retarded by one more
half-wavelength than is accounted for by the path difference alone.)
Wiki User
∙ 11y ago
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