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Question
How is a wavefront different from a ray?
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Solution
- The ray indicates the direction of propagation of the wave while the wavefront is the surface of the constant phase.
- The ray at each point of a wavefront is normal to the wavefront at that point.
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Using Huygens's construction of secondary wavelets explain how a diffraction pattern is obtained on a screen due to a narrow slit on which a monochromatic beam of light is incident normally.
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State Huygen’s principle.
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Wavefront means
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