For Two Identical Rays of Light to Interfere Destructively,their Path

question 21

Multiple Choice

For two identical rays of light to interfere destructively,their path lengths

• A)must be equal.
• B)must differ by an odd number of half wavelengths.
• C)must differ by an even number of half wavelengths.
• D)must differ by an integral number of wavelengths.
• E)need not satisfy any of these conditions.

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