When a tiny circular obstacle is placed in the path of light from a distant source, a bright spot is seen at the centre of the shadow of the obstacle. explain why?
Question: When a tiny circular obstacle is placed in the path of light from a distant source, a bright spot is seen at the centre of the shadow of the obstacle. explain why?
When a tiny circular obstacle is placed in the path of light from a distant source, a bright spot is seen at the center of the shadow of the obstacle due to the phenomenon of diffraction. As light waves pass through the obstacle, they bend and spread out around its edges, creating a circular pattern of interference on the screen behind the obstacle. At the center of the shadow, the waves from different parts of the obstacle overlap and reinforce each other, producing a bright spot. This effect is more pronounced for smaller obstacles and shorter wavelengths of light, such as those in the visible spectrum.
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