Carefully analyses the diagram and choose the correct option :
$i$ and $ii$ are true
$i$ and $iii$ are true
$i$ and $iv$ are true
$ii$ and $ii$ are true
The rays of light first converge and then diverges.
What is the shape of the wavefront on earth for sunlight?
Explain the refraction of a plane wavefront with a thin convex mirror.
Write Huygen's principle and explain it.
Wavefront of a wave has direction with wave motion
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