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Which outcome occurs when parallel coherent light passes through double slits?

A)Alternating bright and dark fringes
B)Uniformly diffused light intensity
C)Refraction angle equals incident
D)Wavelength increase in free space

💡 Explanation

Bright and dark fringes appear because constructive and destructive interference occurs. Therefore, the observed pattern is fringes, because the waves either reinforce each other, rather than diffusing uniformly, which would require incoherent light.

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