Two light sources emit waves that are in phase with a wavelength of λ = 350 nm. The two waves meet at a distant point where Wave #1 has traveled 100 nm. The distance traveled by Wave #2 is variable. Which of the distances for Wave #2, listed below, would result in destructive interference?  1150 nm  800 nm  450 nm  400 nm  975 nm

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Interference of Light

The word "constructive" signifies addition in interference. Constructive interference occurs when the path of the waves that start from the slit differs by 1 entire wavelength or in the intervals of the same. Hence, the waves that are presented on the screen are in phase (crest to crest/trough to trough). The waves interfering constructively forms bright fringes on the screen.