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Question
Wave normals to spherical wavefronts can be ______.
Options
Only diverging
Only converging
Parallel to each other
Diverging or converging
MCQ
Fill in the Blanks
Solution
Wave normals to spherical wavefronts can be Diverging or converging.
Explanation:
It is drawn perpendicular to the wave front, or at 90° to the wave front in the direction of light propagation.
The spherical surfaces in this case are wave fronts, and normal on them are perpendicular to these wave fronts.
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Huygens’ Theory
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