Q.

Eclipses occur due to which optical phenomena?

A. Reflection
B. Refraction
C. Rectilinear propagation
D. Diffraction
Answer» C. Rectilinear propagation
Explanation: An eclipse is an astronomical event that occurs when an astronomical object is temporarily obscured, either by passing into the shadow of another body or by having another body pass between it and the viewer. Rectilinear propagation is a wave property which states that waves propagate (move or spread out) in straight lines.
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