Near the edge of a shadow you see alternate dark and bright bands. This is:
ADispersion
BDiffraction
CReflection
DRefraction
Answer & Solution
Correct answer: B. Diffraction
1. Light bends slightly round the edge of the object.
2. The bent waves interfere near the shadow edge.
3. This is diffraction.
_Source: NCERT Class 12 Physics Part II, Chapter 10, Wave Optics._
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