Which visual effect results when monochromatic light passes Medieval Islamic concave lens with microscopic surface imperfections?

💡 Explanation

When monochromatic light encounters microscopic imperfections on the lens surface, diffusive reflection occurs which generates a random interference pattern forming a speckle pattern. Therefore a speckle pattern is the result, rather than chromatic aberration, spherical aberration, or coma, which arise from different optical phenomena during refraction.

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