Two beams of light in the visible range (400 nm – 700 nm) interfere with each other at a point. The optical path difference between them is 5000 nm. Which of the following wavelengths will interfere constructively at the given point ?

Two beams of light in the visible range (400 nm – 700 nm) interfere

1.	Two beams of light in the visible range (400 nm – 700 nm) interfere with each other at a point. The optical path difference between them is 5000 nm. Which of the following wavelengths will interfere constructively at the given point ?
A.	415.67 nm
B.	556.55 nm
C.	625 nm
D.	666.66 nm
Answer» D. 666.66 nm

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Two beams of light in the visible range (400 nm – 700 nm) interfere with each other at a point. The optical path difference between them is 5000 nm. Which of the following wavelengths will interfere constructively at the given point ?

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